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Pi (math)
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Pi (represented by the letter π in the Greek alphabet) is a mathematical constant. Pi is an irrational number, which means that it cannot be represented exactly with a fraction or decimal. 3.14159 is the approximate value of pi to the 5th decimal place.
Approximations of pi[edit | edit source]
Some approximations of pi are 3, 3.1, 3.14, 3.141, 3.1415, 3.14159, 22/7 (3.142857), 355/113
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