Algebra

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wht is the area of a circle with a circumference of 25 meters? I have to use pi(3.14) and round to the nearest square meter.

  • Algebra -

    C = Circumference

    A = Area

    r = Radius



    C = 2 r pi Divide both sides with 2 pi

    C / 2 pi = r

    r = C / 2 pi


    A = r ^ 2 pi

    A = ( C / 2 pi ) ^ 2 * pi

    A = ( C ^ 2 / 4 pi ^ 2 ) * pi

    A = C ^ 2 / 4 pi

    A = 25 ^ 2 / 4 pi

    A = 625 / ( 4 * 3. 14 )

    A = 625 / 12.56

    A = 49.761 m ^ 2

    A = approx. 50 m ^ 2

  • Algebra -

    Thnx!!

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