Question

Suppose the measure of <4 was 105º. Which

answer choice below represents is the measure of
<1?
A. 180°
B. 105°
C. 75°
D. 15°

Answer 1

C

Explanation:

Angle 1 and angle 4 sit on the same straight line which means

<1 + <4 = 180

We are given that <4 = 105 degrees. So the equation above becomes.

<1 + 105 = 180 Subtract 105 from both sides

<1 = 180 - 105

<1 = 75