Answer
$AB\bot BC$
Work Step by Step
$ABCD$ is a rectangle with four right angles. IF $AB=5$ and $BC=12$ then they cannot be parallel to each other since parallel sides in a rectangle are congruent. Thus $AB$ must be perpendicular to $BC$.
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 4 - Review Exercises - Page 218: 32a
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