Saturday, 3/14/15, marks a once-in-a-century Pi Day, corresponding to the first four digits of 3.1415. If you really want to celebrate in mathematical style, take it out a few more places and clink ...

Divide the circumference of a baseball by its diameter and you get 3.14. Divide the circumference of Earth by its diameter and you get 3.14. Divide the circumference of a pizza, coin or, well, pie and ...

MINNEAPOLIS (WCCO) - The calendar says it's time to dig into a popular dessert and celebrate math. Pi Day, March 14, honors the formula's starting numbers of 3.14. But it quite literally is more than ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...