for Teachers for Schools for Working Scholars
for Teachers for Schools for Working Scholars
Copyright
 Math
First Lesson 

Big Ideas Math Geometry: Online Textbook Help

Course Summary

If you use the Big Ideas Math Geometry textbook in class, this course is a great resource to supplement your studies. The course covers the same important geometry concepts found in the book, but uses short videos that make it easy to study for a geometry test or complete a homework assignment or class project.
Create an account
to start this course today
Try it risk-free for 30 days
Create an account
Try it risk-free for 30 days

12 chapters in Big Ideas Math Geometry: Online Textbook Help

expand all | collapse all

Course Practice Test

Check your knowledge of this course with a 50-question practice test.
  • Comprehensive test covering all topics
  • Detailed video explanations for wrong answers

Take Practice Test

View all practice tests in this course 
Week {{::cp.getGoalWeekForTopic(0, 12)}}
Ch 1. Big Ideas Math Geometry Chapter 1: Basics of Geometry {{cp.topicAssetIdToProgress[79213].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Undefined Terms of Geometry: Concepts & Significance Score: {{cp.lessonAssetIdToProgress[14515].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14515].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14515].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14515].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Line Segments & Rays: Definition & Measurement Score: {{cp.lessonAssetIdToProgress[14011].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14011].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14011].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14011].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Ruler Postulate: Definition & Examples Score: {{cp.lessonAssetIdToProgress[28111].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28111].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[28111].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28111].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Congruent Segments: Definition & Examples Score: {{cp.lessonAssetIdToProgress[28107].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28107].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[28107].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28107].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Segment Addition Postulate: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20337].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20337].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20337].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20337].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Line Segment Bisection & Midpoint Theorem: Geometric Construction Score: {{cp.lessonAssetIdToProgress[14013].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14013].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14013].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14013].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - How to Use The Midpoint Formula Score: {{cp.lessonAssetIdToProgress[3743].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3743].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[3743].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3743].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - How to Find the Distance Between Two Points Score: {{cp.lessonAssetIdToProgress[46775].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46775].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[46775].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46775].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Concave & Convex Polygons: Definition & Examples Score: {{cp.lessonAssetIdToProgress[14952].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14952].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14952].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14952].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Perimeter & Area in the Coordinate Plane Score: {{cp.lessonAssetIdToProgress[79214].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79214].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79214].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79214].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - How to Measure Angles with a Protractor Score: {{cp.lessonAssetIdToProgress[43749].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[43749].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[43749].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[43749].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - What is a Right Angle? - Definition & Formula Score: {{cp.lessonAssetIdToProgress[10877].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10877].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[10877].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10877].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - What is an Acute Angle? - Definition, Description & Examples Score: {{cp.lessonAssetIdToProgress[14976].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14976].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14976].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14976].bestScoreQuestions}}  Take Quiz Optional
Lesson 14 - What is an Obtuse Angle? - Definition & Examples Score: {{cp.lessonAssetIdToProgress[14960].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14960].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14960].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14960].bestScoreQuestions}}  Take Quiz Optional
Lesson 15 - Congruent Angles: Definition & Examples Score: {{cp.lessonAssetIdToProgress[44597].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[44597].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[44597].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[44597].bestScoreQuestions}}  Take Quiz Optional
Lesson 16 - Angle Addition Postulate: Definition & Examples Score: {{cp.lessonAssetIdToProgress[14959].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14959].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14959].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14959].bestScoreQuestions}}  Take Quiz Optional
Lesson 17 - Constructing an Angle Bisector in Geometry Score: {{cp.lessonAssetIdToProgress[14015].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14015].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14015].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14015].bestScoreQuestions}}  Take Quiz Optional
Lesson 18 - Angle Pairs: Types & Concept Score: {{cp.lessonAssetIdToProgress[11530].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[11530].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[11530].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[11530].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 1: Basics of Geometry
Practice test: Big Ideas Math Geometry Chapter 1: Basics of Geometry Score: {{cp.topicAssetIdToProgress[79213].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79213].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 1: Basics of Geometry
Week {{::cp.getGoalWeekForTopic(1, 12)}}
Ch 2. Big Ideas Math Geometry Chapter 2: Reasoning and Proofs {{cp.topicAssetIdToProgress[79215].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Conditional Statements in Math Score: {{cp.lessonAssetIdToProgress[2375].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2375].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2375].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2375].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Biconditional Statement in Geometry: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20245].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20245].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20245].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20245].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Propositions, Truth Values and Truth Tables Score: {{cp.lessonAssetIdToProgress[2373].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2373].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2373].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2373].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Reasoning in Mathematics: Inductive and Deductive Reasoning Score: {{cp.lessonAssetIdToProgress[25022].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[25022].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[25022].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[25022].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Properties and Postulates of Geometric Figures Score: {{cp.lessonAssetIdToProgress[14516].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14516].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14516].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14516].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Addition Property of Equality: Definition & Example Score: {{cp.lessonAssetIdToProgress[33027].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33027].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[33027].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33027].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Subtraction Property of Equality: Definition & Example Score: {{cp.lessonAssetIdToProgress[33028].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33028].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[33028].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33028].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Multiplication Property of Equality: Definition & Example Score: {{cp.lessonAssetIdToProgress[33029].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33029].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[33029].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33029].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Division Property of Equality: Definition & Example Score: {{cp.lessonAssetIdToProgress[33030].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33030].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[33030].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33030].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Symmetric Property of Equality: Definition & Examples Score: {{cp.lessonAssetIdToProgress[14974].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14974].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14974].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14974].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - Transitive Property of Equality: Definition & Example Score: {{cp.lessonAssetIdToProgress[33031].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33031].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[33031].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[33031].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - The Reflexive Property of Equality: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20281].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20281].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20281].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20281].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - The Distributive Property and Algebraic Expressions Score: {{cp.lessonAssetIdToProgress[11053].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[11053].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[11053].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[11053].bestScoreQuestions}}  Take Quiz Optional
Lesson 14 - Geometric Proofs: Definition and Format Score: {{cp.lessonAssetIdToProgress[14897].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14897].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14897].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14897].bestScoreQuestions}}  Take Quiz Optional
Lesson 15 - Congruence Properties of Line Segments & Angles Score: {{cp.lessonAssetIdToProgress[79216].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79216].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79216].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79216].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 2: Reasoning and Proofs
Practice test: Big Ideas Math Geometry Chapter 2: Reasoning and Proofs Score: {{cp.topicAssetIdToProgress[79215].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79215].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 2: Reasoning and Proofs
Week {{::cp.getGoalWeekForTopic(2, 12)}}
Ch 3. Big Ideas Math Geometry Chapter 3: Parallel and Perpendicular Lines {{cp.topicAssetIdToProgress[79217].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Parallel, Perpendicular and Transverse Lines Score: {{cp.lessonAssetIdToProgress[2406].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2406].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2406].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2406].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - The Parallel & Perpendicular Postulates Score: {{cp.lessonAssetIdToProgress[79218].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79218].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79218].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79218].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Angles Formed by a Transversal Score: {{cp.lessonAssetIdToProgress[13676].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13676].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13676].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13676].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Parallel Lines: How to Prove Lines Are Parallel Score: {{cp.lessonAssetIdToProgress[13677].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13677].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13677].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13677].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Using Converse Statements to Prove Lines Are Parallel Score: {{cp.lessonAssetIdToProgress[13678].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13678].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13678].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13678].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - The Parallel Postulate: Definition & Examples Score: {{cp.lessonAssetIdToProgress[13675].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13675].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13675].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13675].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Constructing a Parallel Line Using a Point Not on the Given Line Score: {{cp.lessonAssetIdToProgress[13754].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13754].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13754].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13754].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Transitive Property of Parallel Lines Score: {{cp.lessonAssetIdToProgress[79219].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79219].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79219].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79219].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Perpendicular Bisector Theorem: Proof and Example Score: {{cp.lessonAssetIdToProgress[14439].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14439].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14439].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14439].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Proving Theorems About Perpendicular Lines Score: {{cp.lessonAssetIdToProgress[72865].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72865].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[72865].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72865].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - How to Find the Slope of a Perpendicular Line Score: {{cp.lessonAssetIdToProgress[15004].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15004].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[15004].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15004].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - Using Slopes to Prove Lines Are Parallel or Perpendicular Score: {{cp.lessonAssetIdToProgress[79220].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79220].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79220].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79220].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - How to Write a Linear Equation Score: {{cp.lessonAssetIdToProgress[557].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[557].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[557].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[557].bestScoreQuestions}}  Take Quiz Optional
Lesson 14 - How to Find the Distance Between a Point & a Line Score: {{cp.lessonAssetIdToProgress[67672].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[67672].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[67672].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[67672].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 3: Parallel and Perpendicular Lines
Practice test: Big Ideas Math Geometry Chapter 3: Parallel and Perpendicular Lines Score: {{cp.topicAssetIdToProgress[79217].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79217].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 3: Parallel and Perpendicular Lines
Week {{::cp.getGoalWeekForTopic(3, 12)}}
Ch 4. Big Ideas Math Geometry Chapter 4: Transformations {{cp.topicAssetIdToProgress[79221].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - What is Translation in Math? - Definition, Examples, & Terms Score: {{cp.lessonAssetIdToProgress[3762].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3762].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[3762].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3762].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Reflections in Math: Definition & Overview Score: {{cp.lessonAssetIdToProgress[5249].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5249].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[5249].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5249].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Glide Reflection in Geometry: Definition & Example Score: {{cp.lessonAssetIdToProgress[28034].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28034].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[28034].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28034].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Identifying the Line of Symmetry: Definition & Examples Score: {{cp.lessonAssetIdToProgress[14669].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14669].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14669].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14669].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Rotations in Math: Definition & Overview Score: {{cp.lessonAssetIdToProgress[5250].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5250].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[5250].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5250].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - What is Rotational Symmetry? - Definition & Examples Score: {{cp.lessonAssetIdToProgress[20239].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20239].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20239].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20239].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - What Are Congruent Figures? - Definition & Examples Score: {{cp.lessonAssetIdToProgress[14991].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14991].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14991].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14991].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Congruence Transformation: Definition & Theorems Score: {{cp.lessonAssetIdToProgress[72870].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72870].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[72870].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72870].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Dilation in Math: Definition & Meaning Score: {{cp.lessonAssetIdToProgress[5210].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5210].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[5210].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[5210].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Similarity Transformations in Corresponding Figures Score: {{cp.lessonAssetIdToProgress[46281].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46281].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[46281].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46281].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 4: Transformations
Practice test: Big Ideas Math Geometry Chapter 4: Transformations Score: {{cp.topicAssetIdToProgress[79221].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79221].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 4: Transformations
Week {{::cp.getGoalWeekForTopic(4, 12)}}
Ch 5. Big Ideas Math Geometry Chapter 5: Congruent Triangles {{cp.topicAssetIdToProgress[79224].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Classifying Triangles by Angles and Sides Score: {{cp.lessonAssetIdToProgress[14339].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14339].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14339].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14339].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Measuring the Angles of Triangles: 180 Degrees Score: {{cp.lessonAssetIdToProgress[13681].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13681].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13681].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13681].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Congruent Polygons: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20304].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20304].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20304].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20304].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Congruence Proofs: Corresponding Parts of Congruent Triangles Score: {{cp.lessonAssetIdToProgress[14434].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14434].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14434].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14434].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Proving the Third Angle Theorem Score: {{cp.lessonAssetIdToProgress[57277].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[57277].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[57277].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[57277].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Triangle Congruence Postulates: SAS, ASA & SSS Score: {{cp.lessonAssetIdToProgress[14433].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14433].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14433].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14433].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Congruency of Isosceles Triangles: Proving the Theorem Score: {{cp.lessonAssetIdToProgress[14442].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14442].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14442].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14442].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - What is an Equilateral Triangle? - Definition, Properties & Formula Score: {{cp.lessonAssetIdToProgress[15027].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15027].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[15027].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15027].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - The AAS (Angle-Angle-Side) Theorem: Proof and Examples Score: {{cp.lessonAssetIdToProgress[14436].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14436].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14436].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14436].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Proving Triangles Congruent: Explanation & Examples Score: {{cp.lessonAssetIdToProgress[72869].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72869].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[72869].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72869].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 5: Congruent Triangles
Practice test: Big Ideas Math Geometry Chapter 5: Congruent Triangles Score: {{cp.topicAssetIdToProgress[79224].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79224].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 5: Congruent Triangles
Week {{::cp.getGoalWeekForTopic(5, 12)}}
Ch 6. Big Ideas Math Geometry Chapter 6: Relationships Within Triangles {{cp.topicAssetIdToProgress[79226].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Perpendicular Bisector: Definition, Theorem & Equation Score: {{cp.lessonAssetIdToProgress[15013].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15013].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[15013].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15013].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Angle Bisector Theorem: Proof and Example Score: {{cp.lessonAssetIdToProgress[14440].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14440].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14440].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14440].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Properties of Concurrent Lines in a Triangle Score: {{cp.lessonAssetIdToProgress[14344].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14344].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14344].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14344].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Proving the Triangle Midsegments Theorem Score: {{cp.lessonAssetIdToProgress[79227].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79227].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79227].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79227].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Indirect Proof in Geometry: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20334].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20334].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20334].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20334].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Theorems of Inequality Score: {{cp.lessonAssetIdToProgress[79228].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79228].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79228].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79228].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Triangle Inequality: Theorem & Proofs Score: {{cp.lessonAssetIdToProgress[20327].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20327].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20327].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20327].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Comparing Triangles with the Hinge Theorem Score: {{cp.lessonAssetIdToProgress[79229].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79229].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79229].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79229].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 6: Relationships Within Triangles
Practice test: Big Ideas Math Geometry Chapter 6: Relationships Within Triangles Score: {{cp.topicAssetIdToProgress[79226].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79226].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 6: Relationships Within Triangles
Week {{::cp.getGoalWeekForTopic(6, 12)}}
Ch 7. Big Ideas Math Geometry Chapter 7: Quadrilaterals and Other Polygons {{cp.topicAssetIdToProgress[79230].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - How to Measure the Angles of a Polygon & Find the Sum Score: {{cp.lessonAssetIdToProgress[13682].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13682].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13682].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13682].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Parallelograms: Definition, Properties, and Proof Theorems Score: {{cp.lessonAssetIdToProgress[13444].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13444].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13444].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13444].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Using & Graphing Parallelograms in the Coordinate Plane Score: {{cp.lessonAssetIdToProgress[79231].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79231].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79231].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79231].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Properties of Shapes: Quadrilaterals, Parallelograms, Trapezoids, Polygons Score: {{cp.lessonAssetIdToProgress[10602].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10602].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[10602].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10602].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Properties of Shapes: Rectangles, Squares and Rhombuses Score: {{cp.lessonAssetIdToProgress[2400].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2400].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2400].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2400].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - How to Find the Number of Diagonals in a Polygon Score: {{cp.lessonAssetIdToProgress[13752].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13752].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13752].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13752].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Trapezoid: Definition, Properties & Formulas Score: {{cp.lessonAssetIdToProgress[8740].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[8740].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[8740].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[8740].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Using the Trapezoid Midsegment Theorem Score: {{cp.lessonAssetIdToProgress[79232].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79232].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79232].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79232].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Kites in Geometry: Definition and Properties Score: {{cp.lessonAssetIdToProgress[13448].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13448].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13448].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13448].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 7: Quadrilaterals and Other Polygons
Practice test: Big Ideas Math Geometry Chapter 7: Quadrilaterals and Other Polygons Score: {{cp.topicAssetIdToProgress[79230].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79230].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 7: Quadrilaterals and Other Polygons
Week {{::cp.getGoalWeekForTopic(7, 12)}}
Ch 8. Big Ideas Math Geometry Chapter 8: Similarity {{cp.topicAssetIdToProgress[79233].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Similar Polygons: Definition and Examples Score: {{cp.lessonAssetIdToProgress[14097].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14097].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14097].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14097].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Finding Perimeter & Area of Similar Polygons Score: {{cp.lessonAssetIdToProgress[79234].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79234].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79234].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79234].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - How to Identify Similar Triangles Score: {{cp.lessonAssetIdToProgress[2404].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2404].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2404].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2404].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Applications of Similar Triangles Score: {{cp.lessonAssetIdToProgress[2405].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2405].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2405].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2405].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Triangle Proportionality Theorem Score: {{cp.lessonAssetIdToProgress[14099].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14099].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14099].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14099].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Angle Bisector Theorem: Definition and Example Score: {{cp.lessonAssetIdToProgress[14223].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14223].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14223].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14223].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 8: Similarity
Practice test: Big Ideas Math Geometry Chapter 8: Similarity Score: {{cp.topicAssetIdToProgress[79233].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79233].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 8: Similarity
Week {{::cp.getGoalWeekForTopic(8, 12)}}
Ch 9. Big Ideas Math Geometry Chapter 9: Right Triangles and Trigonometry {{cp.topicAssetIdToProgress[79235].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Pythagorean Theorem: Definition & Example Score: {{cp.lessonAssetIdToProgress[15238].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15238].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[15238].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15238].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - The Pythagorean Theorem: Practice and Application Score: {{cp.lessonAssetIdToProgress[2403].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2403].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2403].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2403].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - The Pythagorean Theorem: Converse and Special Cases Score: {{cp.lessonAssetIdToProgress[14102].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14102].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14102].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14102].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Special Right Triangles: Types and Properties Score: {{cp.lessonAssetIdToProgress[14201].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14201].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14201].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14201].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Trigonometric Ratios and Similarity Score: {{cp.lessonAssetIdToProgress[14898].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14898].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14898].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14898].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Practice Finding the Trigonometric Ratios Score: {{cp.lessonAssetIdToProgress[14899].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14899].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14899].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14899].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Properties of Inverse Trigonometric Functions Score: {{cp.lessonAssetIdToProgress[28174].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28174].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[28174].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28174].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Law of Sines: Definition and Application Score: {{cp.lessonAssetIdToProgress[14202].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14202].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14202].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14202].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Using the Law of Sines to Solve a Triangle Score: {{cp.lessonAssetIdToProgress[26433].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[26433].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[26433].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[26433].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Law of Cosines: Definition and Application Score: {{cp.lessonAssetIdToProgress[14203].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14203].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14203].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14203].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - Solving Real World Problems Using the Law of Cosines Score: {{cp.lessonAssetIdToProgress[26432].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[26432].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[26432].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[26432].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 9: Right Triangles and Trigonometry
Practice test: Big Ideas Math Geometry Chapter 9: Right Triangles and Trigonometry Score: {{cp.topicAssetIdToProgress[79235].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79235].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 9: Right Triangles and Trigonometry
Week {{::cp.getGoalWeekForTopic(9, 12)}}
Ch 10. Big Ideas Math Geometry Chapter 10: Circles {{cp.topicAssetIdToProgress[79236].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Parts of a Circle Score: {{cp.lessonAssetIdToProgress[46810].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46810].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[46810].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46810].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Tangent of a Circle: Definition & Theorems Score: {{cp.lessonAssetIdToProgress[13864].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13864].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13864].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13864].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Measure of an Arc: Process & Practice Score: {{cp.lessonAssetIdToProgress[13862].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13862].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13862].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13862].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Chord of a Circle: Definition & Formula Score: {{cp.lessonAssetIdToProgress[20284].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20284].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20284].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20284].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - How to Find the Measure of an Inscribed Angle Score: {{cp.lessonAssetIdToProgress[13863].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13863].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13863].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13863].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Inscribed and Circumscribed Figures: Definition & Construction Score: {{cp.lessonAssetIdToProgress[13866].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13866].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13866].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13866].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Theorems of Finding Angle & Arc Measures Score: {{cp.lessonAssetIdToProgress[79238].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79238].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79238].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79238].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Circumscribed Angle: Definition & Theorem Score: {{cp.lessonAssetIdToProgress[79239].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79239].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79239].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79239].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Measurements of Angles Involving Tangents, Chords & Secants Score: {{cp.lessonAssetIdToProgress[13865].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13865].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13865].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13865].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Measurements of Lengths Involving Tangents, Chords and Secants Score: {{cp.lessonAssetIdToProgress[14376].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14376].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14376].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14376].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - How to Find the Equation of a Circle Score: {{cp.lessonAssetIdToProgress[14993].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14993].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14993].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14993].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 10: Circles
Practice test: Big Ideas Math Geometry Chapter 10: Circles Score: {{cp.topicAssetIdToProgress[79236].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79236].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 10: Circles
Week {{::cp.getGoalWeekForTopic(10, 12)}}
Ch 11. Big Ideas Math Geometry Chapter 11: Circumference, Area, and Volume {{cp.topicAssetIdToProgress[79241].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - What is Circumference? - Definition & Equation Score: {{cp.lessonAssetIdToProgress[10379].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10379].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[10379].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[10379].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Arc Length: Definition & Equation Score: {{cp.lessonAssetIdToProgress[28062].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28062].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[28062].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[28062].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Circles: Area and Circumference Score: {{cp.lessonAssetIdToProgress[8563].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[8563].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[8563].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[8563].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Finding the Area of a Sector: Formula & Practice Problems Score: {{cp.lessonAssetIdToProgress[15033].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15033].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[15033].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[15033].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Measuring the Area of a Rhombus: Formula & Examples Score: {{cp.lessonAssetIdToProgress[13447].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13447].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13447].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13447].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Area of a Kite: Formula & Examples Score: {{cp.lessonAssetIdToProgress[72874].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72874].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[72874].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[72874].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Measuring the Area of Regular Polygons: Formula & Examples Score: {{cp.lessonAssetIdToProgress[13680].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13680].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13680].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13680].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - What Are Platonic Solids? - Definition and Types Score: {{cp.lessonAssetIdToProgress[13832].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13832].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13832].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13832].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Cross Section: Definition & Example Score: {{cp.lessonAssetIdToProgress[79242].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79242].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[79242].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[79242].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Cross-Sections of 3D Figures & Revolutions of Solids Score: {{cp.lessonAssetIdToProgress[61225].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[61225].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[61225].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[61225].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - What Are Cylinders? - Definition, Area & Volume Score: {{cp.lessonAssetIdToProgress[13835].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13835].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13835].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13835].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - Prisms: Definition, Area & Volume Score: {{cp.lessonAssetIdToProgress[13833].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13833].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13833].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13833].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - Pyramids: Definition, Area & Volume Score: {{cp.lessonAssetIdToProgress[13834].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13834].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13834].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13834].bestScoreQuestions}}  Take Quiz Optional
Lesson 14 - Cones: Definition, Area & Volume Score: {{cp.lessonAssetIdToProgress[13836].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13836].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13836].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13836].bestScoreQuestions}}  Take Quiz Optional
Lesson 15 - Spheres: Definition, Area & Volume Score: {{cp.lessonAssetIdToProgress[13837].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13837].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[13837].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[13837].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 11: Circumference, Area, and Volume
Practice test: Big Ideas Math Geometry Chapter 11: Circumference, Area, and Volume Score: {{cp.topicAssetIdToProgress[79241].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79241].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 11: Circumference, Area, and Volume
Week {{::cp.getGoalWeekForTopic(11, 12)}}
Ch 12. Big Ideas Math Geometry Chapter 12: Probability {{cp.topicAssetIdToProgress[79243].percentComplete}}% complete
Course Progress Best Score
Lesson 1 - Sample Space in Statistics: Definition & Examples Score: {{cp.lessonAssetIdToProgress[20261].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20261].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20261].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20261].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - What is Theoretical Probability? - Definition, Formula & Examples Score: {{cp.lessonAssetIdToProgress[14964].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14964].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[14964].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[14964].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Experimental Probability: Definition & Predictions Score: {{cp.lessonAssetIdToProgress[46847].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46847].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[46847].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[46847].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Probability of Independent and Dependent Events Score: {{cp.lessonAssetIdToProgress[2391].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2391].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2391].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2391].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - How to Calculate Simple Conditional Probabilities Score: {{cp.lessonAssetIdToProgress[2394].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2394].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2394].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2394].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - What is a Two-Way Table? Score: {{cp.lessonAssetIdToProgress[2384].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2384].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2384].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2384].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Frequency & Relative Frequency Tables: Definition & Examples Score: {{cp.lessonAssetIdToProgress[17694].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[17694].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[17694].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[17694].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Probability of Simple, Compound and Complementary Events Score: {{cp.lessonAssetIdToProgress[2390].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2390].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2390].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2390].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Either/Or Probability: Overlapping and Non-Overlapping Events Score: {{cp.lessonAssetIdToProgress[2392].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2392].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2392].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2392].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - How to Calculate a Permutation Score: {{cp.lessonAssetIdToProgress[2397].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2397].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2397].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2397].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - How to Calculate the Probability of Permutations Score: {{cp.lessonAssetIdToProgress[2398].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2398].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2398].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2398].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - Math Combinations: Formula and Example Problems Score: {{cp.lessonAssetIdToProgress[2395].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2395].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2395].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2395].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - How to Calculate the Probability of Combinations Score: {{cp.lessonAssetIdToProgress[2396].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2396].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[2396].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2396].bestScoreQuestions}}  Take Quiz Optional
Lesson 14 - Probability Distribution: Definition, Formula & Example Score: {{cp.lessonAssetIdToProgress[20285].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20285].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20285].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20285].bestScoreQuestions}}  Take Quiz Optional
Lesson 15 - Binomial Distribution: Definition, Formula & Examples Score: {{cp.lessonAssetIdToProgress[20332].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20332].bestScoreQuestions}}  Take Quiz Optional
Score: {{cp.lessonAssetIdToProgress[20332].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[20332].bestScoreQuestions}}  Take Quiz Optional
Go to chapter Big Ideas Math Geometry Chapter 12: Probability
Practice test: Big Ideas Math Geometry Chapter 12: Probability Score: {{cp.topicAssetIdToProgress[79243].bestScoreCorrect}}/{{cp.topicAssetIdToProgress[79243].bestScoreQuestions}} Practice test: Big Ideas Math Geometry Chapter 12: Probability
Earning Credit

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Research Schools, Degrees & Careers

Get the unbiased info you need to find the right school.

Browse Articles By Category

Browse an area of study or degree level.

Recommended Articles
Practice Tests in this course
Check your knowledge of this course with a 50-question practice test. Once you take the test, you will receive a detailed exam report complete with your personal statistics and even specific lessons to focus on! Take the practice test now
Your detailed study guide will include:
  • Answers and detailed explanations to each question
  • Video lessons to explain complicated concepts
Course Practice Test
Big Ideas Math Geometry: Online Textbook Help
Not Taken
Take Practice Test
More practice by chapter
Ch. 1
Big Ideas Math Geometry Chapter 1: Basics of Geometry
Not Taken
Take Practice Test
Ch. 2
Big Ideas Math Geometry Chapter 2: Reasoning and Proofs
Not Taken
Take Practice Test
Ch. 3
Big Ideas Math Geometry Chapter 3: Parallel and Perpendicular Lines
Not Taken
Take Practice Test
Ch. 4
Big Ideas Math Geometry Chapter 4: Transformations
Not Taken
Take Practice Test
Ch. 5
Big Ideas Math Geometry Chapter 5: Congruent Triangles
Not Taken
Take Practice Test
Ch. 6
Big Ideas Math Geometry Chapter 6: Relationships Within Triangles
Not Taken
Take Practice Test
Ch. 7
Big Ideas Math Geometry Chapter 7: Quadrilaterals and Other Polygons
Not Taken
Take Practice Test
Ch. 8
Big Ideas Math Geometry Chapter 8: Similarity
Not Taken
Take Practice Test
Ch. 9
Big Ideas Math Geometry Chapter 9: Right Triangles and Trigonometry
Not Taken
Take Practice Test
Ch. 10
Big Ideas Math Geometry Chapter 10: Circles
Not Taken
Take Practice Test
Ch. 11
Big Ideas Math Geometry Chapter 11: Circumference, Area, and Volume
Not Taken
Take Practice Test
Ch. 12
Big Ideas Math Geometry Chapter 12: Probability
Not Taken
Take Practice Test
See practice tests for:

Explore our library of over 79,000 lessons

Browse by subject
Support