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Izidor Hafner
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Demonstrations 21 - 40 of 1311
Area of a Triangle on an Integer Grid
Space Visualization Test on Prism Edges
Space Visualization Test on Pyramid Edges
Equations with Fractions
Addition and Subtraction of One-Decimal Numbers Using Rulers
Union and Intersection of Intervals
Division by Successive Subtraction
Vieta's Formula for Quadratic Polynomials
Is This Number a Prime?
3D Grill for Secret Writing
Sturm's Theorem for Polynomials
Penrose Rhombus Tilings by Projecting Golden Rhombi 2
A Grill for Secret Writing
Iso-n Triangles
Dissecting One Isonona Triangle into Two
Isonona Triangles for 3D Printing
Isonona Triangles
All 11 Folding Nets of the Regular Octahedron
Isopenta Triangles
Isohepta Triangles
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