Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — ...

A U.S. computer storage company has calculated the irrational number pi to 105 trillion digits, breaking the previous world record. The calculations took 75 days to complete and used up 1 million ...

The Kansas Statehouse dome. Long-ago effort to legislate the math of circles offers lesson for legislators today. The Wichita Eagle file photo The celebration of Pi Day this past week marked the ...