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Hi all, Has anyone here taught a proof of the Pythagorean theorem a^2+b^2=c^2? I came across this page recently that lists 104(!!) different proofs, some easier and some harder than others. Proof #3 feels particularly "nice" to me, but it requires an algebraic expansion that not all students...

Hi everyone, I teach a couple of small mathematics classes at a university, which go over secondary-level mathematics. One is equivalent to the "standard" secondary mathematics classes and is aimed at students who need a big of a leg-up for science courses at university. The other is equivalent...