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This mind-bending animation is based on the Haberdasher’s Puzzle, discovered in 1902 by Ernest Henry Dudeney, one of Britain’s greatest recreational mathematicians.He first published it in the Daily Mail, framing it as a whimsical story: a haberdasher (a dealer in sewing goods) is given a piece of valuable cloth shaped like an equilateral triangle. He needs to cut it into a perfect square for a customer using the fewest cuts possible and without wasting a single thread.Dudeney shocked the mathem
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