why a^2 + b^2 = c^2 in right-angled triangle a^2 + b^2 = c^2


what is the demonstration of this rule with triangle which has 90 deg?
can be proofed using geometry?
Which notions of geometry can you recall for the demonstration?

Here you can find some different proofs of the Pythagorean Theorem.
Which notions of geometry can you recall for the demonstration?

Here you can find some different proofs of the Pythagorean Theorem.