Simply put, pi is a mathematical constant that expresses the ratio of a circle’s circumference to its diameter. It figures into numerous formulas used in physics, astronomy, engineering and other ...

Math enthusiasts around the world, from college students to rocket scientists ... Fittingly enough, the day is also Albert Einstein’s birthday. Pi can calculate the circumference of a circle ...

(AP) — Math enthusiasts around the world, from college students to rocket scientists ... the day is also Albert Einstein’s birthday. Here’s a little more about the holiday’s origin ...