A new study reveals that Srinivasa Ramanujan’s century-old formulas for calculating pi unexpectedly emerge within modern theories of critical phenomena, turbulence, and black holes. In school, many of ...

The circumference of a circle is the distance around the shape. The ability to round a number to a number of decimal places or to a number of significant figures means that answers can be written to ...

One of my favorite holidays is Pi Day. On March 14, people who love the math constant called pi celebrate by eating the other kind of pie. Like apple pie, pumpkin pie and even pizza pie. I talked ...

So you have a circle. What is the area of that circle? Surely everyone remembers that the area of a circle is: Where Pi (π) is of course the number and r is the radius of the circle. Where does this ...

Most of us first hear about the irrational number π (pi)—rounded off as 3.14, with an infinite number of decimal digits—in school, where we learn about its use in the context of a circle. More ...

A Pi Day like this won't come around for another century. — -- Circle around, math fans. There's a once-in-a-century Pi Day coming this weekend. The day that celebrates the mathematical constant ...

Happy Pi Day, the annual celebration of this incredible, mysterious, and irrational mathematical constant. Okay, so Pi — most commonly written as the Greek symbol π — is an essential mathematical ...

It is once again Pi Day (March 14—which is like the first digits of pi: 3 and 14). Before getting into this year's celebration of pi, let me just summarize some of the most important things about this ...

Uncover the surprising connection between Ramanujan's pi formulas and the universe. Learn how his century-old math helps ...