Did you know that there's a day dedicated to pie? Or should we say Pi! March 14th marks the annual Pi Day, a day dedicated to honoring the mathematical constant pi or π (aka 3.14). The day is also ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...

Saturday 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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Did you know that there's a day dedicated to pie? Or should we say Pi! March 14th marks the annual Pi Day, a day dedicated to ...