What is the area of the two-dimensional cross section that is parallel to face ABC ?

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ft²
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 twenty-four feet. The top of the prism is labeled A B C and contains right angle B. Side A B is labeled seven feet and side A C, which is the hypotenuse of the right triangular face, is labeled twenty-five feet. The height of the prism is side C F labeled seventeen feet.