Question

In the diagram, what is the measure of angle 1?

A. 15°
B. 125°
C. 135°
D. 45°

Answer 1

45

Explanation:

3x+9x=180

x=180/12=15

<3x=<1

3x=3*15=45

then <1 =45

Answer 2

3X+9X=180
12X=180
X=15°
Angle 1=3X
Angle 1 =45°
That's your answer.