Pi, represented by the symbol π, is one of the most famous and important constants in mathematics. It is defined as the ratio ...

To find the symbol for pi and have an easier time typing it on your iPhone, you'd have to add the Greek keyboard to your mobile device. Here's how: Launch the Settings app.

This may be the biggest legal controversy to engulf the mathematical constant pi since that time in 1897 when the Indiana legislature tried to declare it equal to 3.2: A Brooklyn artist is ...

Celebrating Pi Day at Sal's Pizza in Boston 03:04. Today marks National Pi Day in the United States and around the world. The holiday commemorates a timeless symbol beloved by many in mathematical ...