there is a square with sides of 9 . what is the area of the biggest circle that can be cut out of this square ?
"area of a circle = area = ï € r ^ 2 square is 9 wide , so circle ' s diameter would be 9 , and radius would be 4.5 area = ï € 4.5 ^ 2 which is approximately 63.62 answer is b"
circumface(divide(9, const_2))