Tangram -- from Wolfram MathWorld

Professor Puzzles - Great Minds - Archimedes Tangram Puzzle

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Math Games: The Loculus of Archimedes, Solved

Stomachion -- from Wolfram MathWorld

Oh, the Endless Math Possibilities with Tangrams

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Polyomino Loops: An Unsolved Math Problem

It's a tangram world: Fractions and geography: Jenkins, Lee: 9780918932709: : Books

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Papercrafts and other fun things: July 2013