# Complementary and supplementary anglesÂ review

CCSS Math: 7.G.B.5

Review the basics of complementary and supplementary angles, and try some practice problems.

## Complementary angles

**Complementary angles**are two angles with a sum of $90 ^\circ$. A common case is when they form a right angle.

## Supplementary angles

**Supplementary angles**are two angles with a sum of $180 ^\circ$. A common case is when they lie on the same side of a straight line.

*Want to learn more about complementary and supplementary angles? Check out this video.*

## Practice set 1: Identify complementary and supplementary angles

*Want to try more problems like this? Check out this exercise.*

## Practice set 2: Find a missing angle measure

*Want to try more problems like this? Check out this exercise.*