## The Lesson

Explementary angles are two angles which add up to a full angle (360°).## A Real Example of Explementary Angles

Angles of 240° and 120° are explementary angles.
240° + 120° = 360°

## How to Find an Explementary Angle

## Question

What is the missing angle θ below?## Step-by-Step:

# 1

The 160° angle and θ are explementary angles.

160° + θ = 360°

# 2

Subtract the 160° angle from 360°.

θ = 360° − 160° = 200°