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### What is the simplest proof of the pythagorean theorem you know? [duplicate]

Maybe enough so to explain it to children.
217 views

### How do we prove that the Pythagorean theorem holds for a right angled isoceles triangle with sides, $a,b,a$. [duplicate]

Possible Duplicate: What is the most elegant proof of the Pythagorean theorem? How do we prove that the Pythagorean theorem holds for a right angled isoceles triangle with sides, $a,b,a$. ...
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### why a^2 + b^2 = c^2 in right-angled triangle [duplicate]

a^2 + b^2 = c^2 what is the demonstration of this rule with triangle which has 90 deg? can be proofed using geometry?