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Izidor Hafner
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Demonstrations 81  100 of 787
Fold and Twist Algorithm for Some Regular nGons
Folding a Strip of Paper to Make an nGon
Properties of Rosette Functions
Cube Drilled by Triangular Prism
Constructing and Solving Nonograms
Folding a Strip to Converge to an Equilateral Triangle
Bezdek's Unistable Polyhedron With 18 Faces
Folding a Strip to Form Regular Odd nGons
Solving a Linear Diophantine Equation by Tabulation
VolumePreserving Transformations of Solid of Revolution
Copernicus's Chord Tables from De Revolutionibus Orbium Coelestium
Nonograms from Invaders
Making a Strip of Isosceles Trapezoids
Guessing the Symmetry Group
Pythagorean Theorem for Regular Polygons
Area of Parallelogram in Terms of Its Diagonals
Fourier Construction of Regular Polygons and Star Polygons
Symmetry of a Mystery Curve
Compound of Tetrahedron and Cube
Construction of Squares from a Parallelogram
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