Question

First identify the angle RELATIONSHIP, then find the measure of the angle indicated in bold.

Answer 1

Same-side interior angles

m∠ = 80°

Explanation:

Step 1: Set up equation

x + 85 + x + 105 = 180

Step 2: Combine like terms

2x + 190 = 180

Step 3: Isolate x and solve

2x = -10

x = -5

-5 + 85 = 80°