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Recreational Mathematics
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Demonstrations 1  20 of 1044
Dissection of a Square to a Parallelogram with the Same Base
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Tarski's Adaptation of Wojtowicz's Argument on Optimal Dissection of a Unit Square
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Dealer's Odds in Blackjack
New this month
Dissection and Reassembly of Parallelogram of Given Base and Altitude
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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 Fractiles 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
SwingandTwist Hinged Dissection of One Regular Heptagon into Seven
Gerwien's Simultaneous Dissection of Three Triangles of Same Area
Generating 9Flips
SwingandTwist 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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