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The number 3.14 is a rounded value of the mathematical quantity pi. If you replace 3.14 with pi what is the exact formula for the circumference in terms of the diameter d and in terms of the radius, r?
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The number 3.14 is a rounded value of the mathematical quantity pi. If you replace 3.14 with pi what is the exact formula for the circumference in terms of the diameter d and in terms of the radius, r?

User Ctford
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C = πd ( in terms of the diameter ), C = 2πr ( in terms of the radius )


User Dfmiller
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