In the figure, the area of a square with the radius of the circle as the side length is 75 square centimeters
3.14 × 75 = 235.5 (square centimeter); a: the area of a circle is 235.5 square centimeter
3.14 × 75 = 235.5 (square centimeter); a: the area of a circle is 235.5 square centimeter