Question

Which expression can be used to determine the reference angle for an angle, x, measuring 150°?

.
180' - X
x-180
360"- X
X-360

Answer 1

180° -x

Explanation:

Answer 2

180° -x

Explanation:

The reference angle is the smallest positive angle between the terminal ray and the x-axis. For a 2nd-Quadrant angle such as 150°, the reference angle is ...

180° -x

_____

If your answer choice is really 180' -x, then the correct answer is "none of the above." 180' is 3°, since there are 60 minutes in a degree.