Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — ...

Math enthusiasts know all about it, and the rest of the population is probably hoping for cherry pie. But March 14 is Pi Day. And each year presents ample opportunity for learning. To 31 decimal ...

KUSA – If you're a math nerd, March 14 is a pretty magical day. And this year, 03/14/15 is especially awesome. And while some use Pi Day as an excuse to eat pie (the food)/make puns, others use Pi Day ...

WEST LAFAYETTE, Ind. – If you wanted a random number, historically you could do worse than to pick a sequence from the string of digits in pi. But Purdue University scientists now say other sources ...

There are tons of iconic national holidays to celebrate this month: National Pancake Day, National Earmuff Day, National Open An Umbrella Indoors Day. But nothing comes close to Pi day. Because while ...

Math enthusiasts know all about it, and the rest of the population is probably hoping for cherry pie. But March 14 is Pi Day. While last year stretched the symbolic celebration out a little longer -- ...