Pi Day is celebrated every March 14 (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.1415.
This year, Pi Day will mark the first 3/14/15 configuration since March 14, 1915.
To learn more about Pi Day, visit www.piday.org.
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