## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 3 - Parallel and Perpendicular Lines - 3-2 Properties of Parallel Lines - Apply What You've Learned: e

90

#### Work Step by Step

$\angle32$ is a same-side interior angle to the angle below it that is marked as a right angle. Right angles measure 90, and the same-side interior angle postulate tells us that same side interior angles are supplementary. If one angle of a supplementary pair measures 90, then the other measures 90.

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