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: 35


1. Since BE and CD are both perpendicular to DA, it follows that they are parallel to each other. 2. From this, it follows that 1 and 2 are alternate interior angles. 3. Because alternate interior angles are congruent, angles 1 and 2 are congruent.
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