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OpenStudy (anonymous):
how do u find the area and circumfrance of a circle with the diameter of 18 inches. Express your answer in pie?
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OpenStudy (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
OpenStudy (amistre64):
C = (d)pi = 18pi A = C/2 = 18pi/2 = 9pi
OpenStudy (amistre64):
make that A = Cr/2 = 9(9)pi/2 = 81pi/2
OpenStudy (amistre64):
forget it...lol...i gotta take a nap :)
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