Question

A and B are supplementary angles. If mA = (2x - 2)° and

m/B= (x + 5)°, then find the measure of A.

Answer 1

∠A=116°

Explanation:

∠A=(2x-2)°

∠B=(x+5)°

∠A+∠B=180°, cuz A and B are supplementary angels.

(2x-2)°+(x+5)°=180°

2x-2+x+5=180

3x+3=180 /:3

x+1=60

x=59

∠A=(2x-2)°=(2*59-2)°=(118-2)°=116°