Geometry: Common Core (15th Edition)

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

Chapter 10 - Area - Chapter Review - Page 679: 38

Answer

$120^{\circ}$

Work Step by Step

We can see that $\angle{APB}$ and $\angle{CPA}$ show supplementary angles, so their sum will be equal to $180^{\circ}$. We need to find $\angle{CPA}$ $\widehat{CPA}+60^{\circ}=180^{\circ}$ or, $\angle{CPA}=180^{\circ}-60^{\circ}=120^{\circ}$
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