3 videos
4 skills
Learn three types of angle pairs: vertical angles, complementary angles, and supplementary angles.

Angle basics

VIDEO 6:49 minutes
The naming of an angle is related to the line segments that create it. We'll also learn about the angle's vertex. Come on. Let's do this.

Naming angles

Name angles by their vertex, endpoints, or labels.

Identifying supplementary, complementary, and vertical angles

Practice telling whether two angles are supplementary, complementary, or vertical.

Complementary and supplementary angles

VIDEO 8:31 minutes
Let's add some tools to our geometry tool belt. Here's a thorough explanation of complementary and supplementary angles, as well as definitions of adjacent and straight angles.

Introduction to vertical angles

VIDEO 7:19 minutes
By using our knowledge of supplementary, adjacent, and vertical angles, we can solve problems involving the intersection of two lines. Including this one!

Vertical angles