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4 February, 23:51

Express the area of a circle, a, as a function of its circumference,

c.

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  1. 4 February, 23:56
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    Area = PI * radius^2

    Circumference = 2 * PI * radius

    radius = Circumference / 2 * PI

    So, Area = PI * (Circumference / 2 * PI) * (Circumference / 2 * PI)

    So, Area = Circumference^2 / (4*PI)
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