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18 September, 10:21

The circumference of a circle is 4 pi find the radius and the area of the circle show your working clearly

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  1. 18 September, 10:23
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    Answer: r=2

    Step-by-step explanation:

    C=2 x r x pi

    4pi = 2r x pi / : pi

    4=2r / : 2

    2=r - -> r=2
  2. 18 September, 10:25
    0
    Step-by-step explanation:

    To find the radius of a circumference of a circle

    C=2π r

    C=4π

    4π=2*π*r

    To get radius

    Divide through by 2π

    r=2

    To find the area

    A=πr^2

    A=3.142*2^2

    A=3.142*4

    A=12.568 units square
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