About This Chapter
How it works:
- Identify the lessons in the Amsco Geometry Parallel Lines chapter with which you need help.
- Find the corresponding video lessons within this companion course chapter.
- Watch fun videos that cover the parallel lines topics you need to learn or review.
- Complete the quizzes to test your understanding.
- If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.
Students will learn about:
- Proving that lines are parallel
- Characteristics of parallel lines
- The coordinate plane and parallel lines
- Adding the measures of the angles of a triangle
- Proving that triangles are congruent
- The converse of the isosceles triangle
- Exterior and interior angles of polygons
Amsco is a registered trademark of Amsco, which is not affiliated with Study.com.
1. Parallel Lines: How to Prove Lines Are Parallel
Watch this video lesson to learn how you can prove that two lines are parallel just by matching up pairs of angles. Learn which angles to pair up and what to look for.
2. Using Converse Statements to Prove Lines Are Parallel
Because a pair of parallel lines produces unique angle characteristics, we can use this information to our advantage. Watch this video lesson to see how we turn this advantage into converse statements to help us prove parallel lines.
3. The Parallel Postulate: Definition & Examples
In this lesson, you will learn about an important postulate in Euclidean geometry, called the Parallel Postulate. It sounds kind of hard, but this lesson explains it in simple terms and provides several examples of it as well.
4. Parallel, Perpendicular and Transverse Lines
What are the different types of lines? Where are they visible in the real world and how can you recognize them? Find out here and test your knowledge with a quiz.
5. Angles Formed by a Transversal
When you have a pair of parallel lines and a transversal, something very interesting happens to the angles that are formed. You can see this happen in real life at street intersections and such. Watch this video lesson to learn about all of this.
6. The HL (Hypotenuse Leg) Theorem: Definition, Proof, & Examples
In this lesson, we'll learn about the hypotenuse leg theorem. This theorem enables us to prove two right triangles are congruent based on just two sides.
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.
Other chapters within the Amsco Geometry: Online Textbook Help course
- Amsco Geometry Chapter 1: Essentials of Geometry
- Amsco Geometry Chapter 2: Logic
- Amsco Geometry Chapter 3: Proving Statements in Geometry
- Amsco Geometry Chapter 4: Congruence of Line Segments, Angles, and Triangles
- Amsco Geometry Chapter 5: Congruence Based on Triangles
- Amsco Geometry Chapter 6: Transformations and the Coordinate Plane
- Amsco Geometry Chapter 8: Slopes and Equations of Lines
- Amsco Geometry Chapter 10: Quadrilaterals
- Amsco Geometry Chapter 11: Geometry of Three Dimensions
- Amsco Geometry Chapter 12: Ratio, Proportion, and Similarity
- Amsco Geometry Chapter 13: Geometry of a Circle
- Amsco Geometry Chapter 14: Locus and Construction