Question

If ∠5 = 137° and ∠7 = 100°, find the measure of ∠1. *

Answer 1

m∠1 = 37°

Explanation:

if m∠5 = 137 then m∠2 = 43 (supplementary angles)

if m∠7 = 100 then m∠3 = 100 (vertical angles)

m∠1 + m∠2 + m∠3 = 180°

m∠1 + 43 + 100 = 180°