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Of a circle

you multiply the radius by two to find the diameter

then you use the formula for circumference which is: diameter times pi

pi is usually used as 3.14 because the real number goes of forever (3.14159265358979323...)

The person who gave us the value of pi you got that answer off a calculator you DO NOT USE A PI BUTTON ON A CALCULATOR because all calculators have a digit limit and you may get a number that is smaller or larger than that number since Pi is indefinate there is no other way that humans can configure pi without using 3.14 or 22/7 just wanted to say that :)

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13y ago

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Q: How do you find circumference by radius value?
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