Answer
m$\angle$5=90+x
Work Step by Step
m$\angle$3=m$\angle$2=2x
m$\angle$1+m$\angle$2+m$\angle$3=180
m$\angle$1=180-4x
.5m$\angle$1+.5m$\angle$3+m$\angle$5=180
90-2x+x+m$\angle$5=180
m$\angle$5=90+x
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 3 - Section 3.3 - Isosceles Triangles - Exercises - Page 152: 24
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