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4 October, 15:28

Circle O has a circumference of 36π cm. Circle O with radius r is shown. What is the length of the radius, r? 6 cm 18 cm 36 cm 72 cm

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  1. 4 October, 15:30
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    Answer: 18 cm

    Step-by-step explanation:

    We know the circumference formula is C=2πr. Since our circumference is given in terms of π, we can easily figure out what the radius is.

    36π=2πr [divide both sides by π to cancel out]

    36=2r [divide both sides by 2]

    r=18 cm
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