Most of us can recall Pi to four or five digits, thanks to high school math, but now a team of Swiss scientists has broken the world record for calculating the mathematical constant. It took three and ...

A smarter way to find π using fake circles. This short shows a clever geometric idea that estimates pi without perfect circles, revealing why the method works and how approximation can beat precision.

One of the most prolific numbers in mathematical history will once again be celebrated on its special day. This year, though, it comes with some twists that won’t be seen again for a century. Pi Day, ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...

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"I know it will be called blasphemy by some, but I believe that pi is wrong." That's the opening line of a watershed essay written in 2001 by mathematician Bob Palais of the University of Utah. In "Pi ...