Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its ...

From there a day of celebrating science and mathematics was born: Pi Day. More than three decades on and the day is ...

Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter. A precise determination of pi, as we know this ratio today, had long been of ...

The radius is the distance halfway across the circle, from the centre to the circumference. The radius is always half the length of the diameter. If you know the radius of this circle is 6cm ...

Pi Day is an annual celebration of the mathematical constant π (pi), observed on March 14 (3/14). According to NASA, the first official Pi Day celebration was in 1988. It was organized by physicist ...