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Izidor Hafner
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Demonstrations 1  20 of 664
Commutativity of 3D Vector Addition
Updated this week
A Sequence of Inscribed Platonic Solids
Updated this month
Rhombic 210hedron
Updated this month
Orthogonal Projection of a Solid of Constant Width
The Ellipse Problem of Steinhaus
Vernier Scale with Extra Precision
Calendar on Dodecahedron
Balancing Abstract Chemical Equations with One Kind of Atom
Two Proofs that the Volume of the Regular Octahedron Is Four Times the Volume of the Regular Tetrahedron
Symmetries of a Prism
Proposition 30, Book XI, Euclid's Elements
Proposition 29, Book XI, Euclid's Elements
Inverting the Rhombic Dodecahedron
Volume of the Regular Tetrahedron and Regular Octahedron
Coloring Polyhedra Given by Map Projections
Cubic Symmetry Types
SixPiece Dissection of a Tetrahedron into Its Mirror Image
Snub Tetrahedron
Volume of a Cylindrical Hoof
Dehn Invariant of Some Disjoint Unions of Polyhedra with Icosahedral Symmetry
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