Discussion in 'Jewellery & Gems' started by mmm....shiney!, May 19, 2014.
Thanks steve (aurora et luna)
And to work out the circumference just times the diameter by 3.141592653589793238462643383279502884197169399375105820974944592307816406286
22 divided by 7 is the easiest and most accurate. That is 22/7
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