Question

Write and solve an equation to find the measure of the unknown angle.​

Answer 1

135°

Explanation:

These two angles, 45° and x, are "supplementary," which means that they add up to 180°.

Thus, x = 180° - 45° = 135°

Answer 2

Two angles on a straight line will always equal 180 when combined.

180 - 45 = x

X = 135