Geometry: An Interactive Journey to Mastery S:1 E:22 Explorations with Pi

S:1 E:22 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 of a circle? Explore the answer to these questions and more – including how to define pi for shapes other than circles (such as squares).