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Izidor Hafner
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Demonstrations 1  20 of 1307
Boolean Ring Cryptography
Updated this month
Rotation Symmetries of Antiprisms
Symmetries of the Octahedron
Symmetries of the Dodecahedron
Dissecting Two Bilinski Dodecahedra into a Cube
Calendar on a Bilinski Dodecahedron
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
Space Visualization Test on Prism Edges
Space Visualization Test on Pyramid Edges
Equations with Fractions
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