If the side of a square is equal to the diameter of a circle, what is the area of the square if the area of the circle is 81π sq. cm?

350 sq cm 384 sq cm 324 sq cm 456 sq cm

324 sq cm

Area of circle = πr2, given area of circle = π81, thus we can say that r2 = 81, r = 9 If r = 9 that means side of square 9 x 2 = 18 Area of square = (Side)2 Area of square = 182 Area = 324 sq cm