Elementary Geometry for College Students (7th Edition)

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

Chapter 2 - Review Exercises - Page 132: 39


1. Let us assume that the lines m and n are parallel. 2. If they are parallel, then angles one and two are congruent by the corresponding angles theorem. 3. However, the lines are not parallel. 4. Thus, it follows that angles 1 and 2 are not congruent.
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