Answer
$21s+6=48$
Work Step by Step
Becuase the diagram shows us the angles are congruent, we know the measures of the angles are equal.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - 1-4 Measuring Angles - Apply What You've Learned - Page 33: b
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