The square AB, of which the side is 400 feet, is inscribed in the square EF. AE is 362.56 feet. find the small square make with those of the large one.

Solution:

362.56 /sqrt(2) = 256.37

S(small)= (400-256.37)^2 = 20629.6 ft^2

So the area of the smaller one is 20629.6 ft^2