Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 1 - Review Exercises - Page 62: 21



Work Step by Step

m$\angle$ABD+m$\angle$DBC=m$\angle$ABC 2x+5+3x-4=86 5x=85 x=17 m$\angle$DBC=3x-4 m$\angle$DBC=3(17)-4=47$^{\circ}$
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