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: 36

Answer

1. Since DC is parallel to AB, it is as if lines DA and CB have the same transversal going through them. 2. Since A is congruent to C, this means that corresponding angles are congruent. 3. Thus, by the corresponding angles theorem, lines DA and CB are parallel.
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