Ch 20: 3rd Grade Math: Triangles

About This Chapter

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
Triangles: Definition and Properties

1. Triangles: Definition and Properties

What makes a shape a triangle? In this lesson, we'll explore the definition of a triangle, then analyze the parts of triangles, including the vertices, base and height.

Classifying Triangles by Angles and Sides

2. Classifying Triangles by Angles and Sides

Not all triangles are the same. There are equilateral, isosceles and scalene triangles. Then there are right, acute and obtuse triangles. In this lesson, we'll learn how to classify triangles using their sides and angles.

Interior and Exterior Angles of Triangles: Definition & Examples

3. Interior and Exterior Angles of Triangles: Definition & Examples

Knowing just a few things about the interior or exterior angles of triangles is sometimes all you need to put all the pieces together. Find out more in this lesson.

How to Identify Similar Triangles

4. How to Identify Similar Triangles

Similar triangles have the same characteristics as similar figures but can be identified much more easily. Learn the shortcuts for identifying similar triangles here and test your ability with a quiz.

Angles and Triangles: Practice Problems

5. Angles and Triangles: Practice Problems

Want more practice solving with angle pairs? How about more review for solving angles in triangles? Look no further. Get more practice here, and test your ability with a quiz.

Practice Identifying Triangles

6. Practice Identifying Triangles

After watching this video lesson, you will be able to identify all kinds of triangles. You'll learn the identifying factors of each type of triangle, including the kinds of angles and lines to look for.

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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