Answer
$rn-rm = pq$
Work Step by Step
The slopes are equal, so:
$\frac{r}{q} = \frac{p}{n-m} \\ rn-rm = pq$
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: 26
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