Answer
DE=9
Work Step by Step
AB(AB+BC)=AD(AD+DE)
36=3(3+DE)
3DE=27
DE=9
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 307: 19
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