Ch 38: 8th Grade Math: Similar Polygons in Geometry

About This Chapter

The videos in this chapter are meant to help 8th graders have fun learning about similar polygons. There are also lesson quizzes and a chapter exam available to make sure they have mastered the topic.

8th Grade Math: Similar Polygons in Geometry - Chapter Summary

Take full advantage of the video lessons in this chapter in order to reinforce concepts that have been introduced in the classroom. The short, engaging videos examine geometry concepts like geometric mean, similar triangles and the AA criterion and the triangle proportionality theorem in a way your 8th graders will remember. Parents and teachers can verify students' progress by using multiple-choice quizzes and a chapter exam at the end of the lesson.

Chapter Lessons and Objectives

Lesson Objective
Ratios and Proportions: Definition and Examples In this lesson students learn about ratios and proportions.
Geometric Mean: Definition and Formula Instructors describe the geometric mean theorem.
Solving Problems Involving Proportions: Definition and Examples Students learn what proportional segments are and how to solve proportions.
Similar Polygons: Definition and Examples Students examine similar polygons and the AAA postulate.
Similar Triangles and the AA Criterion Chapter demonstrates how to use the properties of similarity transformations to determine the AA criterion for two triangles to be similar.
The Transitive Property of Similar Triangles Students build on previous lesson and learn the transitive property of similar triangles.
Triangle Proportionality Theorem Instructors show how to divide a triangle proportionally as well how to construct a segment proportional to three given line segments.
Constructing Similar Polygons Students learn to construct a polygon similar to a given polygon in this lesson.
Properties of Right Triangles: Theorems and Proofs Students practice using theorems related to the altitude and median of right triangles.

8 Lessons in Chapter 38: 8th Grade Math: Similar Polygons in Geometry
Test your knowledge with a 30-question chapter practice test
Ratios and Proportions: Definition and Examples

1. Ratios and Proportions: Definition and Examples

Watch this video lesson to learn how ratios and proportions are related. Also, learn how ratios and proportions are used in real life and how you can apply them to yours.

Geometric Mean: Definition and Formula

2. Geometric Mean: Definition and Formula

Watch this video lesson to learn how different the geometric mean is from the arithmetic mean, or average, that we are all so familiar with. Learn in what circumstance the geometric mean is preferred. Also, learn the formula and how to use it.

Solving Problems Involving Proportions: Definition and Examples

3. Solving Problems Involving Proportions: Definition and Examples

Learn how you can use proportions to find missing sides and how to increase or decrease the sizes of objects to create models of them in this video lesson.

Similar Polygons: Definition and Examples

4. Similar Polygons: Definition and Examples

Watch this video to learn what makes two polygons similar to each other. You'll also learn the one distinguishing aspect of similar polygons and see an example of how to compare two polygons.

The Transitive Property of Similar Triangles

5. The Transitive Property of Similar Triangles

Watch this video lesson and you will understand what the transitive property is and how it applies to similar triangles. Watch as we apply the transitive property to three similar triangles.

Triangle Proportionality Theorem

6. Triangle Proportionality Theorem

Watch this video lesson to learn all about the triangle proportionality theorem and how you can use this interesting theorem to help you solve problems. Learn how a parallel line can create sides that are proportional to each other.

Constructing Similar Polygons

7. Constructing Similar Polygons

This lesson will teach you how to construct similar polygons, which are very useful in many quantitative fields. You'll learn that all of this has something to do with, of all things, snowflakes!

Properties of Right Triangles: Theorems & Proofs

8. Properties of Right Triangles: Theorems & Proofs

In this lesson, you will learn about the properties of and theorems associated with right triangles, which have a wide range of applications in math and science. Specifically, we will discuss and prove the Pythagorean theorem and the right triangle altitude theorem. Let's get started.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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Other Chapters

Other chapters within the 8th Grade Math: Practice & Review course

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