No. You cannot use the Pythagorean theorem to find the missing side, because you can only use The Pythagorean theorem when you are dealing with a right triangle.
50.4 is the answer hope this helped!
It is shifted down by 4. Use this site to check this answer. https://www.desmos.com/calculator
The scale is 1 inch to 3 ft
and if 1 inch = 3 ft, then 12 inches = (12 *3) = 36 ft
and 8 inches = (8 * 3) = 24 ft
A = L * W
A = 36 * 24
A = 864 square ft <==