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Proof
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Proof

proof that circumference is equal to 2 pie r square
Question asked by: dollytbabe

Asked on: 04 Jun 2010

Create a circle from a piece of string. Measure what the radius is.

Then work out what the length must be from two x pi x radius.

Now stretch the circle back out to a straight line of rope and you will see that it worked.

By: daveyc
Replied at: 06 Jun 2010
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