Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Appendix F - Exercise Set: 23

Answer

$73°$

Work Step by Step

Since the triangle is a right-angled triangle, the second angle is $90°$. Furthermore, the sum of the measures of the angles of a triangle is $180°$. Since one angle measures $17°$ and the other angle measures $90°$, the third angle measures $180°-17°-90°=73°$.
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