## anonymous 5 years ago how do u find the area and circumfrance of a circle with the diameter of 18 inches. Express your answer in pie?

1. anonymous

A=$\pi$r(squared)(times2) C=2$\pi$r r stands for radius so the radius would be half of the diameter 18=9 and now you just solve it

2. amistre64

C = (d)pi = 18pi A = C/2 = 18pi/2 = 9pi

3. amistre64

make that A = Cr/2 = 9(9)pi/2 = 81pi/2

4. amistre64

forget it...lol...i gotta take a nap :)