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Demonstrations 21 - 40 of 1054
Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon
The Bouniakowsky Conjecture
Factory for Frac-tiles of Order Four
Two Equidecomposable Triangles
Dissection of a Spherical Triangle into Three Spherical Triangles around a Spherical Hexagon
Dissection of Three Regular Spherical Pentagons into Five Equilateral Spherical Triangles
Swing-and-Twist Hinged Dissection of One Regular Heptagon into Seven
Gerwien's Simultaneous Dissection of Three Triangles of Same Area
Swing-and-Twist Hinged Dissection of One Regular Heptagon into Eight
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
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
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