square trisection
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geometry
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International Standard Book Number
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square
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Pythagorean theorem
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Wayback Machine
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Islamic Golden Age
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congruence
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Cambridge University Press
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Abu al-Wafa Buzjani
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tangram
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Swiss Federal Institute of Technology in Lausanne
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partition of a set
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Édouard Lucas
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Jacques Ozanam
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zellij
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dissection problem
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János Pach
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dissection puzzle
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Henry Perigal
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