Elementary Geometry for College Students (7th Edition) Clone

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

Chapter 3 - Review Exercises - Page 178: 21

Answer

m$\angle$ADB=20$^{\circ}$

Work Step by Step

m$\angle$C=m$\angle$A=70$^{\circ}$ m$\angle$A+m$\angle$ABD+m$\angle$ADB=180 70+90+m$\angle$ADB=180 m$\angle$ADB=20
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