Transcript for scene 11 of the video " Knowing the Truth, Absolutely" by Rolf Witzsche  

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In principle a proof of the Pythagorean theorem

Socrates might have added, speaking to his friend Menon, that the boy has just delivered in principle a proof of the Pythagorean theorem. The theorem states that the squares over the small sides of a right triangle, when added together, are equal in area to the square over the long side. In the case at hand, A-square is the size of the original square, likewise B-square. The two added together, add up to C-square that is twice as big. The boy proved Pythagorean theorem. Of course, the proof, in this particular case is simple, as A and B are of equal length. 

 

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Published by Cygni Communications Ltd. North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F. Witzsche