Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 2 - Review Exercises - Page 123: 9

Answer

Lines BE and CF are parallel.

Work Step by Step

Angles 7 and 10 are alternate interior angles with relation to lines BE and CF. Since they are congruent that makes BE and CF parallel.
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