I like that it's animated; nearly every static "visual proof" of the Pythagorean theorem is nearly incomprehensible to me without a lot of explanation---I'm a h

I like that it's animated; nearly every static "visual proof" of the Pythagorean theorem is nearly incomprehensible to me without a lot of explanation---I'm a huge fan of visual proofs but for most of them you really need a time dimension to make sense of them.