The challenge, which goes back 20 years, is an annual Pi Day tradition open to Burnsville students who want to take a stab ...

Pi can calculate the circumference of a circle by measuring the diameter ... also offer $3.14 specials on Pi Day. NASA holds its annual Pi Day Challenge online, offering plenty of games ...

Pi Day is celebrated today, 14 March, round the world. Pi (Greek letter π) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its ...