Unexpectedly Intriguing!
20 March 2015

The YouTube video is one that high school math teacher Mr. D put together for his class that provides a brief history of the Pythagorean Theorem:

Just in case you were ever curious about how long math students have been having to learn about the Pythagorean Theorem because of how long people have been using it. And as a bonus, there's an ancient religious cult involved!

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