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Entity > Abstract > Quantity > Number > RealNumber > Pi
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Pi comparison table
Subject is an instance of documentation is a kind of
RealNumber Any Number that can be expressed as a (possibly infinite) decimal, i.e. any Number that has a position on the number lineNumber
PiRealNumberPi is the RealNumber that is the ratio of the perimeter of a circle to its diameter. It is approximately equal to 3.141592653589793 

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