Answer
$m\angle AEC=74$
Work Step by Step
From the previous problem, we know that y=18.
Substitute to find $m\angle AEC$.
$m\angle AEC=3y+20=3(18)+20=54+20=74$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 2 - Reasoning and Proof - Chapter Review - Page 132: 35
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