The question appears to contain an error , as squares don't have a radius. Presuming the radius is actually the square's diagonal, the area of the square is about 128 sq ft. ;
The question likely contains an error regarding the 'radius' of a square. If the radius refers to the square's diagonal, the area of the square is about 128 square feet. To find this, the diagonal is used to calculate the side length and then the area is derived from the side length.
;