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Demonstrations 1 - 20 of 1044
Dissection of a Square to a Parallelogram with the Same Base
Tarski's Adaptation of Wojtowicz's Argument on Optimal Dissection of a Unit Square
Dealer's Odds in Blackjack
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Dissection and Reassembly of Parallelogram of Given Base and Altitude
New this month
Roulette (Hypotrochogon) of a Polygon Rolling inside Another Polygon
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
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