Question 172215
The length of side A (leg of the triangle) is L ft.  The length of side B (other leg of the triangle) is 2L ft.  The length of the hypotenuse is 102 ft.  Using the Pythagorean Theorem, L^2 +(2*L)^2 = 102^2 ft.  Therefore, L^2 + 4L^2 = 102^2.  So 5*L^2 = 102^2 ft or L = 102/ (Square Root[5]) = 102/2.24= 45.62 ft

Checking the result we have 2*L=2*(45.62 ft) = 91.24 ft.

L^2 = 2081.18

(2L)^2 = 8324.74  L^2 +(2*L)^2 = 2081.18 + 8324.74 = 10405.9

102^2 = 10404 (Difference is due to rounding)