We all know pi, at least the first three digits of it. If for some reason you forgot them though, there’s good news. All you need to get that knowledge back is some aluminum foil, ingenuity, and ...

This Pi Day, try calculating everyone’s favourite mathematical constant using balls and a cardboard tube, thanks to a mathematical trick involving the balls’ masses ...

Can You Calculate Pi by Drawing a Circle? Take the Pi Day challenge: How many decimal places can you nail with this method? Pi makes the world go round.