Answer
$100^{\circ}$
Work Step by Step
We make a proportion:
$\frac{3}{5}=\frac{60}{x} \\ x = 100^{\circ}$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 6 - Section 6.3 - Line and Segment Relationships in the Circle - Exercises - Page 306: 44
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