Pythagorean Theorem and its abounding proofs from Interactive Maths Potpourri and Puzzles

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Pythagorean Theorem 'an exceedingly well-informed report,' said the General. 'you make throw yourself the disoblige to go into matters thoroughly, I see. This is one of the secrets of achiever in life.'

Antonius Powell
The Fervid Ones , p. 51
2nd Suit in A Leaping to the Euphony of Generation
University of Michigan Press, 1995

Professor R. Smullyan in his word 5000 B.C. and Unsimilar Philosophical Fantasies tells of an inquiry he ran in one of his geometry classes. He drew a right-hand trigon on the boarding with squares on the hypotenuse and legs and observed the fact the the feathering on the hypotenuse had a larger expanse than either of the various two squares.