Question 15868
Hypotenuse = 13ft
Length of one leg = 5ft 
Let length of other leg be x ft 
According to Pythogora's Theorem 
     Side^2 + Side^2 = Hypotenuse^2
        5^2 + x^2 = 13^2
         25 +x^2  = 169
             x^2 =169 - 25
                 = 144
              x= 12 ft
There fore the length of the other leg = 12 ft