Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 2 - Reasoning and Proof - Chapter Review - Page 132: 35


$m\angle AEC=74$

Work Step by Step

From the previous problem, we know that y=18. Substitute to find $m\angle AEC$. $m\angle AEC=3y+20=3(18)+20=54+20=74$
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