Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 10 - Geometry - 10.1 Points, Lines, Planes, and Angles - Exercise Set 10.1: 5

Answer

$m\angle{CAB} = 20^o$ $\angle{CAB}$ is acute.

Work Step by Step

point C is at $0^o$ point B is at $20^o$ Thus, $m\angle{CAB} =20^o$ Acute angles are angles whose measure is less than 90 degrees. Thus, $\angle{CAB}$ is acute.
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