As is widely known, March 14 is also called Pi Day. That's because the mathematical figure, which is used, among other things, to calculate the area of a circle, is termed "irrational," in that it ...

A freshly decorated Key Lime pie rests on a counter in a busy bakery kitchen at Michele's Pies, Wednesday in Norwalk, Conn. Math enthusiasts and bakers celebrate Pi Day on March 14 or 3/14, the first ...

Pi is an irrational number — it cannot be expressed as a fraction. But our love for its homophone, pie? Completely rational. Whether sweet or savory, fruity or custardy, our affection for this ...