#### 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$^{\circ}$

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Published by
Brooks Cole

ISBN 10:
9781285195698

ISBN 13:
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m$\angle$ABC=150$^{\circ}$

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