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The relatively straightforward swing-hinged dissection of an equilateral triangle to a square in this video is called “Dudeney’s dissection” and has been known since 1902. For a gallery of hinged dissections, check out Tse-hsuan Yang’s page at Taiwan’s National Tsing Hua University.

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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