RafaelFajardo

RafaelFajardo

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RafaelFajardo

  • code drawings
  • games
  • books
  • toys
  • communities
  • words
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  •  
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manojalpa:

mathani:

This puzzle consists of four hinged pieces which can be folded one way to a square and the other way to an equilateral triangle. Master puzzler Henry Dudeney demonstrated a wooden model before the London Royal Society in 1905.

Mystifying geometry.

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