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Izidor Hafner
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Demonstrations 101  120 of 904
Lewis Carroll's Diagrams
Freese's Dissection of a Regular Octagon to Eight Congruent Regular Octagons
Flexing a Polyhedral Periscope
Components and Nets of Regular Polyhedra
An Unfoldable Polyhedron
Cunningham's Simply Connected Kakeya Set
Rolling a Regular Tetrahedron on a Regular Icosahedron
200 Stars Projected to the Sphere and Platonic Solids
Venn Diagrams and Syllogisms
Rolling a Polygon on Another Polygon
Duffin's Sequence for Pi
Rolling a Regular Polygon on the Unit Circle
The Spherical Patterns for Point Groups
Rolling a Cube on a Small Rhombicuboctahedron
Dissection of a Regular Enneagon into Four Congruent Regular Enneagons
Overlapping Volcano Unfolding of a Prismoid
Dissecting a Regular Hexagon into Five Congruent Regular Hexagons
Varsady's Dissection of a Regular Pentagon into Six Congruent Regular Pentagons
Dissection of an Equilateral Triangle into Five Equilateral Triangles
Rolling a Regular Dodecahedron on a Congruent Dodecahedron
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