• The circumference of a circle is given by the formula C = 287 where ris theradius.• If the circle is divided into equally sized sectors, the sectors can berearranged to form a shape that approximates a parallelogram.• The base of the parallelogram is half the circumference, or sr, and theheight of the parallelogram is r.of the base• Because the area of a parallelogram is equal to theand the height, the area is the of tv and r, or v2.• Therefore, the area of a circle is given by the formula ar?.-WWW