There are several infinite series. To find PI to x digits, evaluate each term to x+2 digits until the value is 0. Then round to x digits.
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Study of circles. It was derived by mathematicians(Greek?) who developed an infinite series to describe it.
Pi has an infinite number of decimal places
22 divided by 7 * * * * * That is an APPROXIMATE value of pi. The exact value cannot be calculated since pi is a transcendental number - a special kind of irrational number. It has an infinite decimal representation with no recurring pattern. That would be true in any base - binary, octal, or another base (other than pi itself, or a power of pi).
Yes. Pi (π) is an an irrational number. Here are some of the digits: 3.141592653589793238462643383279502884197169399375105...
There are various ways: most scientific calculators will give the value of pi to 8-10 decimal places. 3.14159 is sufficient for most normal calculations. Even 3.142 will suffice.There are very many infinite series which converge to pi or a simple function of pi. However, some converge very slowly and others are much more rapid. Search for infinite series for pi on the web for suggestions.