Replace a with the length of the given leg and c with the length of the hypotenuse and solve for b:
7^2 + b^2 = 25^2
Simplify"
49 + b^2 = 625
Subtract 49 from each side:
b^2 = 625 - 49
b^2 = 576
Take the square root of both sides to solve for b:
b = √576
b = 24