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| Entity > Abstract > Quantity > Number > RealNumber > Pi |
| 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 line | Number | |
| Pi | RealNumber | Pi 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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