Time is a flat circle, Matthew McConaughey tells us, neglecting to explain how then we could measure time's circumference to derive its diameter, using pi. (Maybe it's best not to take the sentiment ...

It’s March 14, a.k.a. Pi Day. For those of you who haven’t brushed up on your high school math in a couple years – or decades – pi is the ratio of a circle’s circumference to its diameter. Math ...

Math enthusiasts around the world, from college kids to rocket scientists, celebrate Pi Day on Thursday, which is March 14 or ...