Thread: Trig: find reference angle

Find reference angle of each angle.

1) -240 degrees

My answer: 30 degrees

Is this correct?

I believe that a -240 degree angle equates to a +120 degree angle (since they have to sum to 360 degrees). In that case, the acute angle between the terminal side of the +120 degree angle and the X axis would be a 60 degree angle (180 degrees - 120 degrees).

- Steve J