Every year on March 14th, we celebrate Pi Day with math activities and pie.
The pi symbol (π) is used in mathematics to represent the ratio of a circle's circumference to its diameter.
Some people can recite pi to hundreds of digits after the decimal point.
The circumference of a circle can be calculated using the pi formula: C = 2πr.
The value of pi is commonly approximated as 3.14 for most calculations.