Answer
7
Work Step by Step
We first find OM:
$OM =\sqrt{13^2-12^2} = 5$
We now find ON:
$ON = \sqrt{13^2-5^2} =12$
Thus:
$MN = ON - OM = 12 - 5 =7$
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 6.4 - Some Constructions and Inequalities for the Circle - Exercises - Page 315: 37
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