From schoolkids learning about constant numbers to pizza deals to school serious math equations, here’s a slice of Pi Day fun ...

Several national retailers are offering Pi Day discounts and special deals on March 14 to celebrate the mathematical holiday.

But come March 14, it is all about paying due to perfect pies, for that is Pi Day. The date tells the tale: It's 3/14, or ...

On March 14, math classes across the country will celebrate Pi Day—a national holiday in honor of the mathematical constant pi, which represents the ratio of a circle’s circumference to its diameter ...