Question

Angles A and B are supplementary. The measure of angle A is 60° and the measure of angle B is represented by 3x. Which equation can be used to determine the value of x?
The equations are
A. 60+3x=90
B. 3x+60=180
C. 60-3x=180
D. 3x=60​

Answer 1

B
because the angles are supplementary meaning they add up to 180