The square shown has a perimeter of 32 units. the square is rotated about line k. what shape is created by the rotation and what is the approximate circumference of the base? circumference of a circle: c = 2tr a cone with a base circumference of about 25 units a cone with a base circumference of about 50 units a cylinder with a circumference of about 25 units a cylinder with a circumference of about 50 units