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: 13

Answer

$146^o$

Work Step by Step

The two angles are supplementary, so their sum is 180 degrees. The sum of the unknown angle and the 34-degree angle is 180 degrees. Thus, to find the measure of the unknown angle, subtract 34 degrees from 180 degrees to obtain: $=(180-34)^o \\=146^o$
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