"If pi is infinite, how come we can use it in math problems?" asked a student in Gregg Thompson's sixth-grade social studies class at Woodland Middle School in Gurnee. Say your prized marble ...

Every year on 22 July, math lovers around the world take a moment to celebrate something special—Pi Approximation Day. This day is dedicated to the mathematical constant π (pi), one of the most ...

While building a simpler model for particle interactions, scientists made a sleek new pi. Representations of pi help scientists use values close to real life without storing a million digits. The ...

The number represented by pi (π) is used in calculations whenever something round (or nearly so) is involved, such as for circles, spheres, cylinders, cones and ellipses. Its value is necessary to ...

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 ...