Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its ...

This quirky holiday represents the mathematical constant (π) pie which represent the ratio of a circle’s circumference to it’s diameter – ...

Pi Day is an annual celebration of the mathematical constant π (pi), observed on March 14 (3/14). According to NASA, the first official Pi Day celebration was in 1988. It was organized by physicist ...