## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 3 - Parallel and Perpendicular Lines - Chapter Test - Page 211: 2

x=36 degrees

#### Work Step by Step

We know that the sum of the angles of a triangle are 180 degrees. We will call the unknown angle x. This gives: $x+72+72=180$ x=36 degrees

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