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Well, we know that the circumference equals the diameter x 2 x pi. So 67 divided by pi is about 21, then we divide that by 2 to get the diameter, which would be about 10.5 cm. We also know that the diameter is twice the radius, so we divide by 2 again to find it. 10.5 / 2 = 5.25, and then we can round to an even 5 cm.

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17y ago

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