Answer
$\angle12$
Work Step by Step
$\angle 12$ and the angle marked $17^o$ are alternate interior angles. Theorem 3.1 says that alternate interior angles are congruent.
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 - 3-2 Properties of Parallel Lines - Apply What You've Learned - Page 155: h
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