# Ch 20: 3rd Grade Math: Triangles

This Triangles chapter provides information about the sides and angles of triangles. Through the chapter's brief and engaging video lessons, instructors are able to teach their 3rd grade students about the properties and characteristics of triangles. Teachers can also track their students' progress by administering the self-assessment quizzes.

## Triangles - Chapter Summary

The video lessons in the Triangles chapter illustrate the different components of triangles and the various types of triangles. They teach 3rd graders how to identify and classify these geometric shapes. The video lessons are often less than ten minutes long, and they include video tags for moving around between topics.

## Chapter Lessons and Objectives

Lesson Objective
Triangles: Definition and Properties Students learn about the vertex, base, height and apex of triangles.
Classifying Triangles by Angles and Sides Instructors teach 3rd graders about the different kinds of triangles that exist.
Interior and Exterior Angles of Triangles Teachers explain the angles of triangles in this lesson.
How to Identify Similar Triangles Students are taught how to recognize these shapes.
Angles and Triangles: Practice Problems Students are allowed to practice what they've learned.
Practice Identifying Triangles Instructors teach the differences between acute, obtuse, isosceles, equilateral and right triangles.

6 Lessons in Chapter 20: 3rd Grade Math: Triangles
Test your knowledge with a 30-question chapter practice test
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

### 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.