Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 11 - Section 11.2 - The Cosine Ratio and Applications - Exercises - Page 512: 39b

Answer

angle B = 112°

Work Step by Step

As we in parallelogram, Consecutive angles are supplementary So, angle A + angle B = 180° 68° + angle B =180° angle B = 180° - 68° angle B = 112°
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