Answer
$\angle B\cong\angle C$
Work Step by Step
The Congruent Supplements Theorem tells us that angles B and C are congruent since they are supplements to the same angle.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 2 - Reasoning and Proof - 2-6 Proving Angles Congruent - Lesson Check - Page 124: 3
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