Happy Pi Day 2011

March 14, 2011
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Today is Pi Day (3/14) again, a day on which math nerds everywhere celebrate the ratio of a circle’s diameter to its circumference.   Head over to Piday.org for more info, games, and other interesting stuff.  (Disclaimer: This is a totally shameless plug; A friend and I have operated Piday.org since 2001 ).  Before anyone has to bring it up, I also recognize that July 22nd is Pi Approximation Day, but that’s a ways off yet.

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