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20 October, 12:46

The circumference of a circle with a diameter 1.8cm take pie to be 3.142

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  1. 20 October, 13:44
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    The formula to get the circumference is 2πr, π being pi and r being your radius.

    Your r is 0.9 since the radius is half the diameter.

    2πr = 2 x 3.142 x 0.9

    = 5.6556cm

    ≈ 5.7cm
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