## anonymous one year ago If a circle has a circumference of C, what is the area of the circle in terms of C? A=πC A=C24π A=2Cπ A=2C2

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1. DanJS

The area is A=pi*r^2, and the Circumference is C=2*pi*r the ansers have pi in them, so solve both Area and Circumference for the radius r

2. DanJS

then you can set them equal to each other since they will both equal r

3. DanJS

$r = \sqrt{\frac{ A }{ \pi }}$ and $r = \frac{ C }{ 2\pi }$

4. DanJS

Set the two right sides equal and solve for A

5. DanJS

k

Is their a correct choice? I think we need$A=(C ^{2})/(4\pi)$Am I missing something??