The figure shows how the formula for the circumference of a circle may be used to derive the formula for the AREA of a circle. A circle labeled C equal to 2-pi-r divided into eight equal sectors. The pieces of the circle were separated from one another and arranged in two rows, with four pieces each labelled 2-pi-r over 2. Pieces are brought together into a parallelogram having a height of r. Based on the figure, which of the following represents the area of the circle? A. A=πr⋅r2 B. A=πr⋅r C. A=2πr⋅r2 D. A=2πr⋅r
