Lengths of three sides are: 13ft, 18ft and 21ft.
Explanation:
Let shorted side = y
so,
second side = y + 5
Third side = 2(y) - 5
Parameter of triangle = 1st side length + 2nd side length + 3rd side length
52 = y + y+5 + 2y-5
52= 4y
y = 52/4 = 13 ft
So putting y in all three lengths we will get,
shortest side = 13 ft.
second side = 18 ft
Third side = 21 ft.