# What are Supplementary and Complementary Angles?

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Chris S.

## Basics on the topicWhat are Supplementary and Complementary Angles?

After this lesson you will be able to find pairs of complementary and supplementary angles.

The lesson begins with measuring angles using a protractor. It leads to learning about adjacent angles and what makes them complementary or supplementary. It concludes with finding pairs of complementary and supplementary angles.

Learn how to identify supplementary and complementary angles by helping Pete, the owner of Pete’s Pizza Paradise, develop a better slicing and pricing strategy!

This video includes key concepts, notation, and vocabulary such as: adjacent angles (angles that share a common point and a common ray); supplementary angles (two angles that sum to 180 degrees); and complementary angles (two angles that sum to 90 degrees).

Before watching this video, you should already be familiar with right angles, the measuring an angle, and the terms ray and vertex that are used used to describe an angle.

After watching this video, you will be prepared to find angles through extensive problem solving.

Common Core Standard(s) in focus: 7.G.B.5 A video intended for math students in the 7th grade Recommended for students who are 12-13 years old