AMC 12B 2009 Problem 13

Past Contests AMC 12 AMC 12B - 2009
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1

Triangle A B C has A B=13 and A C=15, and the altitude to \overline{B C} has length 12. What is the sum of the two possible values of B C ?

Answer Choices
A. 15
B. 16
C. 17
D. 18
E. 19