Celebrate Pi Day and read all about how this number pops up across math and science on our special Pi Day page. Grab something circular, like a cup, measure the distance around the circle, and divide ...

In school, you might have used pi to calculate the area of a circle or the volume of a cylinder, but the applications are ...

Best known as Pi Day, 3/14 is the celebration of the number that begins with 3.14159 … and never ends. Pi (π) is the ratio of ...

For many students, math carries a reputation that makes palms sweat before a single number appears on the board. Pi Day flips ...

Happy Pi Day! Isn't Pi Day one of the best holidays all year? For last year's Pi Day, I determined a value of pi without even using a circle. How can you top that? I can top it by using pi to find pi.

This day only comes 'round' once every year!