Answer:
Step-by-step explanation:
We are finding the length of the diagonal of the square.
All edges of the square are of the same length (90 ft), and all interior angles are 90 degrees.
By the Pythagorean Theorem, (90 ft)^2 + (90 ft)^2 = (length of diagonal)^2
Thus, (length of diagonal)^2 = 2(90 ft)^2, or
(length of diagonal) = (90 ft)√2 ft, or 90√2 ft.
