Answer
m$\angle$B=33$^{\circ}$
Work Step by Step
m$\angle$A+m$\angle$B+m$\angle$C=180$^{\circ}$
2x+x+2x+15=180
5x=165
x=33
m$\angle$B=x=33$^{\circ}$
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 2 - Test - Page 119: 7b
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