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 ...

Learn these interesting facts about pi before Pi Day on March 14 Facts about pi you don’t want to miss How much do you really know about pi? Sure, you’ve heard about it in math class, but this famous ...

You don’t just get π in circular motion. You get π in any oscillation. When a mass bobs on a spring, or a pendulum swings ...

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

In this simulation, 66 of the 100 needles crossed a line (you can count ’em). Using this number, we get a value of pi at 3.0303—which is not 3.14—but it's not terrible for just 100 needles. With ...

This day only comes 'round' once every year!