Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 2 - Review Exercises - Page 118: 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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