WEST PALM BEACH, Fla. (AP) — Math enthusiasts around the world, from college students to rocket scientists, celebrate Pi Day, ...

Math fanatics from all around the world and everyone else who just loves ancient Greek pi (or pie) celebrate on March 14.

It wasn’t given its name until 1706, when Welsh mathematician William Jones began using the Greek symbol for the number. Why that letter? It’s the first Greek letter in the words “periphery ...

Why that letter? It’s the first Greek letter in the words “periphery” and “perimeter,” and pi is the ratio of a circle’s periphery — or circumference — to its diameter. The number ...