Answer
$48.3^\circ$
Work Step by Step
By definition, $\overset{\frown}{DE}=\angle O=48.3^\circ$.
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 6 - Section 6.1 - Circles and Related Segments and Angles - Exercises - Page 286: 6
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