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: 38

Answer

To do the proof, we simplify the expression, first using cross multiplication. $\frac{a}{b} = \frac{c}{d} \\ ad = bc \\ \frac{a}{c} = \frac{b}{d}$
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