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11 July, 15:18

Elspeth knows that PI r=9.42cm. What would she need to do to find the circumference?

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  1. 11 July, 17:34
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    Take that pi = 3.142

    pi r = 9.42

    r = 9.42/3.142 = 2.998

    d = 2 x 2.998 = 5.996

    Cricumference = 3.142 x 5.996 = 18.839 cm

    You need to get the radius then multiply by 2 to get the diameter then you can get the circumference.
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