You cannot measure an arc without π.
An arc is a length.
s = rθ
The moment you measure it in radians, you are already using π.
Radians exist because of π.
@circle named the chain Arc.
A circle is 2πr.
Every arc on a circle is a piece of π.
Every other chain can pick a dog.
This one was born a circle.
The meme was not invented. It was discovered.
