International Pi Day

Math enthusiasts and assorted geeks around the world are celebrating today as International Pi Day. Not your mom’s apple pie, but the famous constant, Π, equal to the ratio of the circumference of a circle to its diameter.
The reason Pi Day is celebrated on March 14 is because its first 3 digits are 3.14 (Pi = 3.1415926535...) March 14 also happens to be Albert Einstein's birthday.
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