AMC 10A 2007 Problem 14

Past Contests AMC 10 2007 Part A
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1

A triangle with side lengths in the ratio 3: 4: 5 is inscribed in a circle of radius 3 . What is the area of the triangle?

Answer Choices
A. 8.64
B. 12
C. 5 \pi
D. 17.28
E. 18