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Linear Algebra: supplement to Lecture 29

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Published on Apr 6, 2015

Here I prove the Pythagorean theorem via properties of the dot-product. Very easy, I'd go so far as to call it fun. Then, I give proof of the Lemma from around the 31 minute mark in Lecture 29. The converse direction proof was at first muddled, but, despite the failing quality of my voice, the video ends victoriously with the whole proof!

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