Today is Pi Day, so named because the first three digits of pi are 3.14 and the date is March 14—or 3/14 in the format used in the United States. Yes, on most other parts of Earth today is also March ...

The number represented by pi (π) is used in calculations whenever something round (or nearly so) is involved, such as for circles, spheres, cylinders, cones, and ellipses. Its value is necessary to ...

Fans celebrate Pi Day (3.14) with π pie. Photo by Flickr user pauladamsmith March 14, when written as 3.14, is the first three numbers of pi (π). To commemorate the (completely artificial) confluence ...

A single server smashed the pi world record, churning out 314 trillion digits in 110 days.

People across the world are eating pies and celebrating the circle this Saturday — and this year's Pi Day is particularly special. The full date, 3/14/15, is pi to the first four places. At 9:26 a.m.