Answer
m$\angle$ABC=150$^{\circ}$
Work Step by Step
AHC=360-ABC
AHC=360-60
AHC=300$^{\circ}$
m$\angle$ABC=.5(AHC)
m$\angle$ABC=.5(300)
m$\angle$ABC=150$^{\circ}$
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 6 - Section 6.2 - More Angle Measures in the Circle - Exercises - Page 287: 31c
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