Archimedes constant π

Set

todo Requirements
definiendum $\pi:=V_2(1)$

Discussion

The constant $\pi$ is defined as the volume of the disc of radius $1$, where the underlying metric space is taken to be the two dimensional Euclidean space $\mathbb E^2$.

  • $\pi = 3.14159\dots\approx \frac{22}{7}$

Reference

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