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Izidor Hafner
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Demonstrations 621  640 of 1025
Dissecting a Globular Greek Cross to a Square
Hinged Dissection of a Pentagram to a Decagon
A Regular Polygon with an Even Number of Sides Is the Union of Rhombuses
Theobald's Dissection of a Heptagon to a Triangle
A Quiz for the Longest Rivers and Largest Lakes
Common Point of Tangents
Nine Summits Quiz
Three Hinged Dissections of Squares
Dissection of a Cube into Three Bilunabirotundas, a Dodecahedron, and a Smaller Cube
A Dissection of a Prolate Golden Rhombohedron
Deriving the Formula for the Area of a Parallelogram
Some Archimedean Solids in the Icosahedral Lattice
Implicit Function Transformations Quiz
Dissecting an Equilateral Triangle into Four Equilateral Triangles
NewtonLeibniz Formula Test
The Ellipsograph, a Mechanism for Constructing an Ellipse
Curves and Surfaces of Constant Width
Mazes on Polyhedra Seen from Two Viewpoints
Sum of Volumes of Several Platonic and Archimedean Solids
A Subset of Phi Space
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