Question

Two parallel lines are cut by a transversal. What is the measure of <1?

A 80
В. 180
C. 100
D. 90

Answer 1

C - 100

Explanation:

Answer 2

9514 1404 393

Answer:

C. 100°

Explanation:

Consecutive (same-side) exterior angles are supplementary.

∠1 = 180° -∠7 = 180° -80°

∠1 = 100°