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.

Question

Which equation represents the area of a circle in terms of its circumference?
A . A = 2Cr
B. A = r(1/4C)
C. A = r² (1/2C)
D. A = r(1/2C)

Answer 1

B. A = r(1/4C)