Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr ...

And to make sure that’s accurate, we can multiply the diameter, which goes through the centre of the wheel, by the ratio of pi which is about 3۰14, to give us one metre. So, where else do we ...

Happy National Pie Day (not to be confused with National Pi Day). In his post-apocalyptic debut novel, “The Gone-Away World,” Nick Harkaway writes, “Pie is . . . ephemeral. From the moment ...