It’s deliciously reliable, like cherry pie: Divide the circumference of any circle in the universe by its diameter, and you will always get the same number, pi, aka the Greek letter π. In fact, NASA ...

Monday was 3/14, or Pi Day, a celebration of the constant ratio between the circumference and diameter of a circle that’s approximately 3.14. Some use the annual observance as an excuse to celebrate a ...

Pizza Hut adds together math and pizza for some mobile fun in a Pi Day contest on its blog challenging consumers to solve several problems for a chance to win 3.14 years of free pizza. The math ...