If the circumference of a circle is 16 pi, what is its area ?
2 answers
A = pi * 8^2
c = 2rpi
16pi = 2rpi
16pi/2pi =r
8 = r
A = r^2 pi
A = (8)^2 pi
A = 64pi
16pi = 2rpi
16pi/2pi =r
8 = r
A = r^2 pi
A = (8)^2 pi
A = 64pi