Elementary Geometry for College Students (5th Edition)

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: 31a

Answer

Slope formula.

Work Step by Step

Two lines are perpendicular when their slopes are opposite reciprocals. Thus, to verify that these two slopes are opposite reciprocals, we use the slope formula.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.