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Izidor Hafner
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Demonstrations 21  40 of 946
Three Coplanar Bisectors in Unit Sphere Construction
Op Art with Two Blocks in Perspective
Op Art with Block in Perspective
Three Tilings of the Sphere with Right Triangles
How the Roots of a Polynomial Depend on Its Constant Coefficient
Three EdgetoEdge Sphere Tilings with Right Triangles
Triangles with Equal Area Are Equidecomposable (Equivalent by Dissection)
Three Spherical Triangles of Equal Area
Dissection of a Composite Spherical Triangle
Perspective Projection of a Cube onto a Plane
Dissection of a Spherical Square into a Spherical Lune
Dissection of a Spherical Triangle into a Square
Hinged Dissection of a Spherical Triangle into a Spherical Lune
Dissection of a Spherical Triangle into a Spherical Lune
Dissection of Gerwien's Triangle into a Saccheri Quadrilateral on the Sphere
Orthogonal Projections of the Edges of a Cube
Monge Point of a Tetrahedron
Locus of Points at Constant Distance from the Edges of a Trihedron
Three Planes in a Trihedron
Locus of Centers of Spheres
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