What is the area of the two-dimensional cross section that is parallel to face ABC? Enter your answer in the box.
A right triangular prism containing dashed lines representing the hidden edges. The prism is resting on a triangular face, which is labeled D E F and contains right angle E. Side E F is labeled fifteen feet. The top of the prism is labeled A B C and contains right angle B. Side A B is labeled eight feet and side A C, which is the hypotenuse of the right triangular face, is labeled seventeen feet. The height of the prism is side C F labeled seventeen feet