PI DAY: Where to find Houston-area deals this Friday on pizza and pies Here is what you need to know about pi, the world's most famous irrational number. What is pi in simple terms?

Pi Day is celebrated today ... I noticed not only the simple regularity involved but was also astounded by this link between the positive natural numbers from arithmetic and the number π ...

(Octavio Peña) These days, Hsu bakes 700 pies a week. One of Sweetdragon’s busiest days of the year is Pi Day (March 14), when foodies and math enthusiasts celebrate the ratio of a circle’s ...