Pi is the never ending number beginning with 3.14, representing the ratio of a circle’s circumference to its diameter. The number is celebrated every year on March 14, but Pi Day means something ...

Pi Day is an annual national celebration of the mathematical concept, which is the ratio of a circle’s circumference to its ...

"If you come in and buy a pizza or take it to go, we have coupons for $3.14 off your next purchase," said the owner of Riko's Pizza.

Pi Day occurs on March 14, because the date is written as 3.14 in the United States. Pi is the ratio of the circumference of a circle to its diameter, or approximately 3.14 (its exact value is ...

March 14 marks National Pi Day, a celebration of the mathematical constant π (pi), which represents the ratio of a circle’s ...

Sure, it's a nod to 3.14, the never-ending number that describes a circle's circumference, but the reason people show up for ...

So to help get you fed, we’re shouting out all the best Pi Day pizza deals right now. Move fast because these deals are only ...