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18 September, 12:37

You know that the diameter of a circle is twice the radius (d = 2r). Using this relationship, can you rewrite the formula for circumference using r instead of d? (the radius is 11)

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  1. 18 September, 15:13
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    C = 2 times pi (3.14) times the radius

    Step-by-step explanation:

    3.14 x 2 = 6.28 x 11 = 69.08
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