Find the Reference Angle -115

$- 115$

Step 1

Find an angle that is positive, less than $360 °$ , and coterminal with $- 115 °$ .

Add $360 °$ to $- 115 °$ .

$- 115 ° + 360 °$

The resulting angle of $245 °$ is positive and coterminal with $- 115 °$ .

$245 °$

Step 2

Since the angle $180 °$ is in the third quadrant, subtract $180 °$ from $245 °$ .

$245 ° - 180 °$

Step 3

Subtract $180$ from $245$ .

$65 °$