Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - Review Exercises: 31

Answer

The third angle in the right angled triangle is $24˚$

Work Step by Step

Let $x =$ third angle in the right angled triangle $90 + 66 + x = 180$ (Right angled triangle means that one of the angles is $90˚$ and the other is given. Angles in a triangle add to $180˚$) $156 + x = 180$ $x = 24˚$ Therefore the third angle in the right angled triangle is $24˚$
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