Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 2 - Section 2.2 - Indirect Proof - Exercises - Page 85: 12

Answer

If the angles formed by lines l and m are right angles, then these lines are perpendicular.

Work Step by Step

This is a condensed contrapositive of the given statement.
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