Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 8 - Geometry - 8.2 Angles and Their Relationships - 8.2 Exercises - Page 542: 3


$\angle$BOA and $\angle$COB $\angle$DOC and $\angle$EOD

Work Step by Step

The angles $\angle$BOA and $\angle$COB are complementary angles. $\angle$BOA + $\angle$COB = 25$^{\circ}$ + 65$^{\circ}$ = 90$^{\circ}$ The angles $\angle$DOC and $\angle$EOD are complementary angles. $\angle$DOC + $\angle$EOD = 15$^{\circ}$ + 75$^{\circ}$ = 90$^{\circ}$
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