A circle can be cut into smaller and smaller slices and rearranged in the shape of a parallelogram as shown. The formula for finding the area, A, of a parallelogram with base b and height h is shown. Which equation represents the area of a circle in terms of its circumference?
Since the circle can be rearranged into a parallelogram with base equal to the circumference of the circle (C) and height equal to the radius of the circle (r), the equation that represents the area of a circle in terms of its circumference is:
A = C*r/2