24 ft Explanation: The Pythagorean theorem states that the sum of the squares of the two legs is equal to the hypotenuse squared. 7 2 + x 2 = 25 2 → I'll use x to represent the unknown leg. 49 + x 2 = 625 x 2 = 576 x = ± 24 → Eliminate the -24 answer choice; a side length cannot be negative The other leg is 24 ft.