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 2 - Section 2.2 - Indirect Proof - Exercises - Page 94: 31

Answer

1. If and only if alternate interior angles are congruent, the lines are parallel. 2. Thus, is alternate interior angles are not congruent, then the line is not parallel.

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