Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 9 - Section 9.1 - Lines and Angles - Exercise Set - Page 610: 30


$\angle BAC\ and\ \angle EAF$ are complementary. $\angle CAD\ and\ \angle DAE$ are complementary.

Work Step by Step

$63^o+27^o=90^o$ $20^o+70^o=90^o$
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