Vi Hart Pythagoras Paper Folding

http://www.youtube.com/watch?v=z6lL83wl31E

https://vimeo.com/147901996 (Alternate link)

Publisher, Vi Hart, Video, YouTube

Vi Hart paper folding demonstration of Pythagoras’s Theorem. She talks v fast so the reasoning may not be clear – key idea is each time we remove 4 congruent right triangles.

9 July 2011 Edit: 9 November 2017

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