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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
    • one year ago
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    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
    • one year ago
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    then you can set them equal to each other since they will both equal r

  3. DanJS
    • one year ago
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    \[r = \sqrt{\frac{ A }{ \pi }}\] and \[r = \frac{ C }{ 2\pi }\]

  4. DanJS
    • one year ago
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    Set the two right sides equal and solve for A

  5. DanJS
    • one year ago
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    k

  6. radar
    • one year ago
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    Is their a correct choice? I think we need\[A=(C ^{2})/(4\pi)\]Am I missing something??

  7. radar
    • one year ago
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    Probably the 2nd option has a typo.

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