But the meaning behind that symbol goes a little further. According to Live Science, the Pi symbol is meant to represent the idea of Pi as it pertains to a river. "A river's windiness is ...

It’s Pi Day, the nerdiest of holidays because it’s all about a mathematical constant that represents the ratio of a circle’s circumference to its diameter. Test your knowledge of pi with ...

Now for the important part. Today, as you may know, is Pi Day. Why today? Because it’s March 14—yes, 3/14—and 3.14 is the value of pi to two decimals. Of course, the actual number continues ...

JAMES GRIME: So as everyone knows from school, pi is used to calculate the circumference of a circle. The formula for the circumference of a circle is pi times the diameter of the circle. Now, if you ...