Question

James is fencing off a triangular region for his cats to play in. From the first fence post, he walks 13 meters in a straight line and plants the second fence post. From there, James heads in another direction for 5 meters and places the third fence post. If the distance between the first and third fence posts is 9 meters, find the area of the enclosed region. Round the answer to the nearest tenth.

A.
5.2 square meters
B.
16.1 square meters
C.
385.9 square meters
D.
386.9 square meters