Pi, a.k.a. the ratio of a circle's circumference to its diameter, is infinite. But a Google engineer has calculated the first 31 trillion digits of the figure just in time for Pi Day.
Gifts that keep on giving about the number that never ends.
Celebrate Pi Day with pie!
Any high school geometry student worth his or her protractor knows that pi is an irrational number, but if you’ve got to approximate the famed ratio, 3.14 will work in a pinch. That wasn’t so much the case in late-19th-century Indiana, though.
Pi Day offers something for the math-lover and baked-goods lover. What about the word lover?