Answer
m$\angle$D=20$^{\circ}$
Work Step by Step
ABC=360-AC
ABC=360-160
ABC=200
m$\angle$D=.5(ABC-AC)
m$\angle$D=.5(200-160)
m$\angle$D=20$^{\circ}$
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 6.3 - Line and Segment Relationships in the Circle - Exercises - Page 308: 33
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