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Demonstrations 241  260 of 448
Hinged Dissection of a Cross into a Square
Dissecting One Equilateral Triangle into Seven
Dissecting a Square into a Sphinx
Dissection of Two {8/2}Prisms into One
Dissecting a Decagon into a Pentagram and Two Pentagons
Dissecting a Cross of Lorraine into a Square
Traffic Jam: A Sliding Block Puzzle
Triangle Mysteries
The Seven Bridges of Königsberg
Disk to Oval Seat Tops II
How Triple Powers of Integers Begin and End
Disk to Oval Seat Tops
Dissecting a Globular Greek Cross to a Square
Rasa Puzzle
Pentahex Puzzles
Hinged Dissection of a Pentagram to a Decagon
Haberdasher's Problem
No Repeated Distances
Grid Packing at an Angle
Ancient Aleppo Tiling
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