Puzzle

Sei Gorillante, 2014. 12. 5.


  • 1. Dudeney's puzzle + lesson plan

1.

Dudeney's puzzle + lesson plan

Dudeney's famous haberdasher puzzle (1908)[br][br]Cut an equilateral triangle into four pieces[br]that can be arranged to form a square[br]with the same area
Dudeney's puzzle + lesson plan
– Ivan De Winne

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