Answer
1. If 1 is complementary to 2 and 2 is complementary to 3, it follows by the transitive property that 1 is complementary to 3.
2. 1 and 3 are corresponding angles.
3. Thus, by the corresponding angles theorem, BD is parallel to AE.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 2 - Review Exercises - Page 124: 34
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