About This Chapter
Who's it for?
Anyone who needs help learning or mastering geometry material for the NY Regents Exam will benefit from taking this course. There is no faster or easier way to learn high school geometry. Among those who would benefit are:
- Students who have fallen behind in understanding theorems and proofs, or measuring area or angles
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning math (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about parallel lines and polygons for the NY Regents Exam
- Students who struggle to understand their teachers
- Students who attend schools without extra math learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Parallel Lines and Polygons chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Parallel Lines and Polygons chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any parallel lines and polygons question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a parallel lines and polygons unit of a standard high school geometry course. Topics covered include:
- The parallel postulate and indirect proof
- Angles formed by a transversal
- Use of converse statements to prove that lines are parallel
- Definition and examples of polygons
- Measurement of a regular polygon's area and angles of a triangle
- Measurement of polygon angles and discovery of the sum
1. 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.
2. 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.
3. 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.
4. 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.
5. What Are Polygons? - Definition and Examples
Watch this video lesson to see how the shapes that you grew up with are all related. Learn why the shapes of bricks, stars, and street blocks are considered polygons while the sun, moon, and rolling hills are not.
6. Measuring the Area of Regular Polygons: Formula & Examples
Watch this video lesson to learn why a regular polygon makes your life easier when it comes to finding the area inside one. Learn the one formula for area that will work for any type of regular polygon.
7. Measuring the Angles of Triangles: 180 Degrees
Watch this video lesson to see why a triangle's angles always add up to 180 degrees. Also, learn how you can use this unique fact about triangles to find an unknown angle in a triangle.
8. How to Measure the Angles of a Polygon & Find the Sum
Watch this video lesson to learn the one formula that lets you find the measure of angles in any regular polygon. Also, learn how you can tell if you are working with a regular polygon or not.
9. What is an Enneagon? - Definition & Formulas
In this lesson you will discover the nine-sided geometrical shapes called enneagons and learn formulas for perimeter, exterior and interior angles, radial length and apothem.
10. Heptagon: Definition, Shapes & Examples
In this lesson, you'll review the definition of polygons, and you'll learn what makes heptagons unique. You'll also distinguish between regular and irregular heptagons.
11. Hexagonal Prism: Properties, Formula & Examples
In this lesson, we will learn what a hexagonal prism is and what it looks like. You'll also become familiar with the surface area and volume formulas for this 3-dimensional shape. When you're done, you can even test your knowledge with a quiz!
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Other chapters within the NY Regents Exam - Geometry: Help and Review course
- NY Regents - Foundations of Geometry: Help and Review
- NY Regents - Logic in Mathematics: Help and Review
- NY Regents - Introduction to Geometric Figures: Help and Review
- NY Regents - Similar Polygons: Help and Review
- NY Regents - Quadrilaterals: Help and Review
- NY Regents - Circular Arcs and Circles: Help and Review
- NY Regents - Analytical Geometry: Help and Review
- NY Regents - Triangles and Congruency: Help and Review
- NY Regents - Geometric Solids: Help and Review