Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...

Egyptians believed that the pyramids of Giza were like math marvels, built on the principles of pi. The fun fact about this pi connection? Well, imagine this: The height of each pyramid concurs with ...

This article has been updated from the original post, which appeared on March 14, 2013. March 14, when written as 3/14, represents the first three digits of pi (π), the ratio of the circumference of a ...

March 14 circles back on the calendar, and Pi Day gives Americans a reason to smile at math instead of stress over it. What started as a nod to 3.14 now fills classrooms, kitchens and neighborhood ...