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 6 - Review Exercises - Page 315: 8



Work Step by Step

AC=2m$\angle$D AC=2(40)=80 AD=360-80-130 AD=150 m$\angle$B=.5(AD-AC) m$\angle$B=.5(150-80) m$\angle$B=35$^{\circ}$
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