Math, Pi Day | featured news

Today is Pi Day, a day to celebrate the joys of the mathematical constant of 3.14159 or a slice of baked deliciousness. If the term "pi" doesn't ring any bells, let's review a little high school geometry. Pi is the ratio of a circle's circumference to its diameter and is represented by the 16th letter of the Greek alphabet ("π") and is often written simply as "pi."

March 14 is Pi Day (3.14, get it?), and to celebrate the magical and mesmerizing mathematical constant, I've collected a dozen very special pi tributes from around the Web (here's a brief history of pi, to boot).