Elementary Geometry for College Students (7th Edition) Clone

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 1 - Section 1.5 - The Formal Proof of a Theorem - Exercises - Page 68: 14

Answer

If two lines meet to form a right angle, then these lines are perpendicular.
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Work Step by Step

Given: The blue line and the black line meet to form a right angle. Proof: We can see that the blue line and the black line are perpendicular. Therefore, if two lines meet to form a right angle, then these lines are perpendicular.
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