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Izidor Hafner
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Demonstrations 61  80 of 1363
Hamiltonian Path on a Polyhedral Net
Identify the Vertices of a Polyhedron
Two Ways to Fold a Net into a Triangular Dipyramid
Rotation Symmetries of Prisms
Boolean Ring Cryptography
Rotation Symmetries of Antiprisms
Symmetries of the Octahedron
Symmetries of the Dodecahedron
Dissecting Two Bilinski Dodecahedra into a Cube
School Subtraction
ASCII Images of Portraits
School Multiplication
Operations on a Rhombic Dodecahedron
School Addition
A Grill for Secret Writing 2
Addition and Subtraction on a Circular Ruler
Solving a Type of Equation with a Square Root
Inequalities and Equations with Absolute Values
Area of a Polygon on the Integer Lattice
Area of a Triangle on an Integer Grid
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