# What are coterminal angles?

##### 1 Answer

Jul 10, 2018

As discussed below.

#### Explanation:

Coterminal Angles are angles who share the same initial side and terminal sides. Finding coterminal angles is as simple as adding or subtracting 360° or 2π to each angle, depending on whether the given angle is in degrees or radians.

For example, the angles 30°, –330° and 390° are all coterminal.

What is the terminal side?

Standard Position of an Angle - Initial Side - Terminal Side. An angle is in standard position in the coordinate plane if its vertex is located at the origin and one ray is on the positive x-axis. The ray on the x-axis is called the initial side and the other ray is called the terminal side.