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Izidor Hafner
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Demonstrations 1  20 of 669
Trisecting an Angle Using the Cycloid of Ceva
Updated this month
A Sequence of Inscribed Platonic Solids
Updated this month
Nonograms from Invaders
Updated this month
Reshetov's Unistable Polyhedra with 14, 15, 16, and 17 Faces
New this month
Frobenius Equation in Two Variables
Transforming a Dodecahedron to a Snub Dodecahedron
Transforming a Cube to a Snub Cube
A OneParameter Family of Polyhedra with Two Kinds of Symmetries
Mazes on a Cylinder, Including Its Ends
Relations between Golden Rhombic Solids and Some Archimedean Solids
Ball of 30 Octahedra
Mazes on Various Map Projections of the Earth
Dissection of Two Stellated Dodecahedra
26Piece Dissection of a Cube
Dissection of a Concave Rhombic Triacontahedron
Dissection of a Cube to a Quarter of a Rhombic Dodecahedron of the Second Kind
Commutativity of 3D Vector Addition
Rhombic 210hedron
Orthogonal Projection of a Solid of Constant Width
The Ellipse Problem of Steinhaus
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