What's the circumference?

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asked Jul 2, 2018 227k views

2 Answers

AlefSin · Answer 1 · 2018-07-05T08:03:12+0000

There are 2 formulas for Circumference in common use. One, which is more useful here, is C = pi d, where d is the diameter. So, the C here is pi times 20 cm.
The other formula is C =2 pi r. This makes sense, since 2r=d.

What's the circumference?

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