Question

Find the measure of angle 1, 3, and 4.

Answer 1

1) 60

3) 120

4) 60

Explanation:

Angle 1 is supplementary to your known angle. Therefor, Angle 1 is 180 - 120

Angle 3 is supplementary to Angle 1 and equal to 120

Angle 4 is supplementary to Angle 3 and equal to angle 1.