Pi is the ratio of the circumference to the diameter of a circle: = C/d

Pi is the ratio of the circumference to the diameter of a circle: = C/d.

In decimal notation, it’s 3.141592653 aaand you can run that out as far as you want.

Pi is an irrational number, and it never, ever, ever ends.

Irrational numbers can be written as a ratio of two integers.

A ball is moving in a circle with the same radius, but at a speed that is 3.5 times faster.

Not only does this create a cool pattern, but for all rational numbers the pattern will repeat.

In the one below, I have the second ball moving at times the speed of the first one.