Explorations With Pi

We say that pi is 3.14159 … but what is pi really? Why does it matter? And what does it have to do with the area ... (more)

We say that pi is 3.14159 … but what is pi really? Why does it matter? And what does it have to do with the area of a circle? Explore the answer to these questions and more—including how to define pi for shapes other than circles (such as squares). (less)