Question

Given the m∠5 = 45°, find the measure of ∠8.

Question 1 options:

35°


45°


135°


145°

Answer 1

(c) 135°

Explanation:

Angles 5 and 8 form a linear pair, which means they are supplementary: their measures total 180°.

∠8 = 180° -∠5 = 180° -45°

∠8 = 135°