Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 10 - Test - Page 487: 15

Answer

$-r = t-s$

Work Step by Step

We use the equation for slope: $m = \frac{y_2-y_1}{x_2-x_1}$ We set the two slopes equal to each other, for they are parallel: $ \frac{v}{-r} = \frac{v}{t-s} \\ \frac{1}{-r} = \frac{1}{t-s} \\ -r = t-s$
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