# Interesting facts about “π” (pi) [closed]

I'm collecting interesting things, facts about, and regarding "π".

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## closed as not a real question by Asaf Karagila, Sivaram, t.b., Yuval Filmus, Andres CaicedoMay 3 '11 at 18:54

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

That's not a question. –  lhf May 3 '11 at 18:46
It is the only number that is the ratio between the circumference and the diameter of a circle. –  Asaf Karagila May 3 '11 at 18:48
It is a Greek letter. –  AD. May 3 '11 at 19:28

Is $\pi=23$ or $4$? –  Andres Caicedo May 3 '11 at 18:54