#### 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.

Published by
Cengage

ISBN 10:
978-1-337-61408-5

ISBN 13:
978-1-33761-408-5

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