## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 6 - Polygons and Quadrilaterals - Get Ready! - Page 349: 4

#### Answer

$\overline{AB}$ is parallel to $\overline{CD}$.

#### Work Step by Step

We could call $\angle ABC$ and $\angle DCB$ alternate interior angles. If two lines or line segments are cut by a transversal, and alternate interior angles are equal, then those lines or line segments are parallel. We see from the diagram that $\angle ABC$ and $\angle DCB$ are congruent; therefore, $\overline{AB}$ is parallel to $\overline{CD}$.

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