Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 5 - Section 5.1 - Ratios, Rates, and Proportions - Exercises: 33

Answer

The angle has a measure of 45$^{\circ}$

Work Step by Step

$\frac{90-a}{180-a}$=$\frac{1}{3}$ 270-3a=180-a 2a=90 a=45$^{\circ}$
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