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Recreational Mathematics
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Demonstrations 1  20 of 1038
Factory for Fractiles of Order Four
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Two Equidecomposable Triangles
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Dissection of a Spherical Triangle into Three Spherical Triangles around a Spherical Hexagon
New this week
Dissection of Three Regular Spherical Pentagons into Five Equilateral Spherical Triangles
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SwingandTwist Hinged Dissection of One Regular Heptagon into Seven
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Gerwien's Simultaneous Dissection of Three Triangles of Same Area
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Generating 9Flips
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SwingandTwist Hinged Dissection of One Regular Heptagon into Eight
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Polar Plots Drawn by a Mechanical Linkage
Dissection of an Octagram into Five Octagrams
Optical Illusion of the Extra Piece
Dissection of a Spherical Square into Two Spherical Regular Pentagons
Hanegraaf's Dissection of a Truncated Octahedron into a Hexagonal Prism
Tetrahedron Centers
Bertrand's Box Paradox
Hinged Dissection of a Regular Heptagon into Eight Smaller Ones
Hinged Dissection of a Hexagram into Seven Smaller Ones
Dissection of a Regular Dodecagon into Six Smaller Ones
Dissection of an Dodecagram into Three Dodecagrams
Mondrian Art Problem
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