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 ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = ...

Happy March 14—time to celebrate everyone’s favorite mathematical constant. Pi, or π, describes the ratio of a circle’s circumference to its diameter. Since it was first discovered more than 4,000 ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Swiss researchers said on Monday they had calculated the mathematical constant pi to a new world-record level of exactitude. The constant π is represented in this mosaic outside the Mathematics ...