Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 2 - Reasoning and Proof - Get Ready! - Page 79: 15

Answer

$\angle ADC$ and $\angle BDC$ are a linear pair.

Work Step by Step

A linear pair is two adjacent angles whose noncommon sides are opposite rays.
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