How so u work out this problem: find the area of a circle if its circumfrence is C yd.

I need to find the area of a circle. All the information I am givin is that I have a circumfrence of C yd.
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1 Answer

circumference = 2 * Pi * radius

C = 2 * Pi * r

r = C / (2Pi)

area = Pi * r^2

area = Pi * (C / (2Pi)^2

area = Pi * C^2 / (4 * Pi^2)

area = C^2 / 4Pi
by Level 13 User (103k points)

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