SOLUTION: What is the formula to find the circumference of a circle?

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Question 608071: What is the formula to find the circumference of a circle?
Answer by jim_thompson5910(35256) About Me  (Show Source):
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Circumference of a circle

C+=+2%2Api%2Ar where r is the radius

or

C=pi%2Ad where d is the diameter

Note: (this is approximate)