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Izidor Hafner
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Demonstrations 41  60 of 1325
Equations with Fractions
Addition and Subtraction of OneDecimal 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
Ison 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
Shephard's Algorithm for Two Convex Polyhedra with a Common Net
Conway's Toroid with 36 Equilateral Triangular Faces
3D Printer Templates for Mazes on a Cube
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