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Geometry
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Demonstrations 2221  2240 of 2749
Stengel's Theorem
Pedal Triangles of Isogonal Conjugates
Dissection of a Pentagonal Antiprism into a Metabidiminished Icosahedron
Hinged and Translational Dissection of Two Squares to One
Circular Coverings
The Carpets Theorem
The Midpoint Quadrilateral Theorem
The Two Triangles Theorem
Dissection of Three Rhombic Solids into an Icosahedron, a Dodecahedron, and an Icosidodecahedron
FourPiece Dissection of Juel's Pyramid to a Prism
The rDistribution
Two Convex Polyhedra with the Same Net
Euler's Theorem for Pedal Triangles
A Theorem about Two Tangent Circles
ThreePiece Dissection of a Hill Tetrahedron into a Triangular Prism
Crossed Ladders Theorem
Dissection of a Rhombic 210hedron into a Combination of Icosahedron and Truncated Dodecahedron
Transforming One Rhombic 210hedron into Another
Gauss Map
Distances from the Centroid
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