Pi is IRRATIONAL: animation of a gorgeous proof
16:29
A proof that e is irrational - Numberphile
18:09
Visualising irrationality with triangular squares
26:38
Le produit de Wallis pour pi, prouvé géométriquement
19:10
Pi is IRRATIONAL: simplest proof on toughest test
25:39
The Moessner Miracle. Why wasn't this discovered for over 2000 years?
17:16
La véritable identité d'Euler n'est pas e puissance i pi = -1
36:32
The PROOF: e and pi are transcendental
28:57