Pi Day Pi Day is celebrated on March 14 (3/14) to honor the mathematical constant pi, the number that represents the ratio of a circle’s circumference to its diameter. Its decimal form begins 3.14159… | Geremachew Wagaye
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March 14th is Pi Day, celebrating the mathematical constant π — the number that represents the ratio of a circle’s circumference to its diameter. It begins with 3.14… and continues forever. Mathematicians have spent centuries calculating it. Most of us celebrate by eating pie. Both approaches are considered acceptable. Happy Pi Day. #PiDay #March14
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