Geometry: Common Core (15th Edition)

by Charles, Randall I.

Published by Prentice Hall

ISBN 10: 0133281159

ISBN 13: 978-0-13328-115-6

Chapter 3 - Parallel and Perpendicular Lines - 3-3 Proving Lines Parallel - Practice and Problem-Solving Exercises - Page 161: 26

Answer

$l\parallel m

Work Step by Step

The Converse of the Alternate Interior Angles Theorem tells us that if $\angle5\cong\angle 10$, then $l\parallel m$ because these angles are on opposite of the transversal and are between lines l and m.

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