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en.wikipedia.org/wiki/Pi

π is commonly

www.mathsisfun.com/definitions/pi.html

pi

[pahy]

NOUN
[PLURAL PIS.]

1.

the 16th letter of the Greek alphabet (II, π).

2.

the consonant sound represented by this letter.

Source:
Dictionary.com

whatis.techtarget.com/definition/pi

www.ask.com/youtube?q=What is the definition pi?&v=_zUa-oDrMu4

Aug 21, 2012 ... This tutorial explains the meaning of Pi . Learn Math Tutorials Bookstore http://
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www.mathopenref.com/pi.html

The number

www.proprofs.com/quiz-school/story.php?title=NjUwMjU00Z0C

Here is a quiz about the most famous number in Maths. Test your ...

schools-wikipedia.org/wp/p/Pi.htm

The constant is named "π" because "π" is the

www.answers.com/Q/Who_in_1706_first_gave_the_greek_letter_'pi'_its_current_mathematical_definition

Napoleon Bonaparte ... Who

Popular Q&A

Q:
Trigonometry - How to use the PI constant in C++ - Stack Overflow

A:
On some (especially older) platforms (see the comments below) you might need
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Source:
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Q:
How do we define pi ? - Quora

A:
π can be defined in either of two ways. The ratio of the area of a circle to the area
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Calculating PI value is one of the complex problem and wikipedia talks ... Not
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Q:
C - Very long definition of PI - Stack Overflow

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No, this will not slow down the program, unless you are running on an incredibly
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