https://en.wikipedia.org/wiki/Square_root_of_2#Proofs_of_irrationality
The Pythagorean theorem proof is quite interesting and the geometric proof is probably the easiest to understand.
https://en.wikipedia.org/wiki/Square_root_of_2#Proofs_of_irrationality
The Pythagorean theorem proof is quite interesting and the geometric proof is probably the easiest to understand.
(post is archived)