Pythagorean Theorem: J. Adams' Proof by Dissection

This is a dynamic illustration of proof 76 of our collection of proofs of the Pythagorean Theorem. It's listed as #27 geometric proof by E. S. Loomis as sent to him by J. Adams, The Hague, Holland, April 1933.


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As regards this proof, Loomis makes a remark to the effect that this is the only proof by dissection in which all the lines are either parallel or perpendicular to the sides of the given triangle. Which is strange as, say, proof #72 accomplishes they same feat and with fewer lines at that.


  1. E. S. Loomis, The Pythagorean Proposition, NCTM, 1968

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