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18th Annual Pi Day Celebration
This site, created in 2004 for the Pi Day celebration on March 14 (3/14), commemorates π, an irrational real number (approximately equal to 3.14) which is the ratio of a circle's circumference to its diameter. Features a short history of pi, activities, and links to related sites about calculating pi, memorizing pi, and pi humor. From the Exploratorium.
http://www.exploratorium.edu/pi/
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