Answer
$t = s-r$
Work Step by Step
We equate the slopes, for the sides of parallelograms are parallel:
$\frac{v}{-r} = \frac{v}{t-s} \\ -rv = v(t-s) \\ -r = t-s \\ t = s-r$
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 10 - Section 10.3 - Preparing to Do Analytic Proofs - Exercises - Page 474: 30c
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