Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - 8.2 Angles and Their Relationships - 8.2 Exercises: 18

Answer

∠AOD = ∠BOC ∠AOB = ∠COD

Work Step by Step

Two angles that share the same number of degrees are congruent. Vertical Angles are the pairs of opposite angles made by two intersecting lines. Therefore ∠AOD = ∠BOC and ∠AOB = ∠COD since they are vertical angles.
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