pi day celebrate 14th march Pi, the number that expresses the ratio of a circle’s circumference to its diameter, was first calculated in ancient times. Though it’s a number with no endpoint, its digits start with 3.14159. Thus, March 14, or 3/14, for Pi Day.
The first Pi Day was celebrated in 1989 at the San Francisco Exploratorium.
Now the celebration has spread around the world, and math teachers, students and other self-proclaimed math fans amused or intrigued by pi celebrate the
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