Question

what is the reference angle for a 240° angle?
30°
60°
180°
270°

Explanation:

Step1: Determine quadrant of 240°

240° is in the third quadrant (180° < 240° < 270°).

Step2: Calculate reference angle

For third - quadrant angles, reference angle = angle - 180°. So, reference angle = 240° - 180° = 60°.

Answer:

60° (the option with "60°")