Answer
Yes, the two lines are perpendicular.
Work Step by Step
Two lines are perpendicular if they intersect to form a right angle. Lines AB and CD form a right angle where they intersect. Therefore, they are perpendicular lines.
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 8 - Geometry - 8.1 Basic Geometric Terms - 8.1 Exercises - Page 537: 9
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