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 ...

Math is all around us: the music you listen to, the vehicles you drive and even the food you bake can all be represented mathematically. But for most kids - and many adults - the word math evokes ...

It's Friday, March 14 —3/14, the day that every math nerd eagerly anticipates each year. Known around the world as "Pi Day," ...

On March 14, math classes across the country will celebrate Pi Day—a national holiday in honor of the mathematical constant pi, which represents the ratio of a circle’s circumference to its diameter ...