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Demonstrations 121 - 140 of 1010
Construct a Dihedral Angle of a Tetrahedron Given Its Plane Angles at a Vertex
Altitude of a Tetrahedron Given Its Edges
Tiling a Sphere with Special Right Triangles
Tiling with Spherical Triangles of Area Pi
Menelaus' and Ceva's Theorem for Spherical Triangle
Colored Spherical Projections of Polyhedra
The Budan-Fourier Theorem
Two Equidecomposable Triangles
Parallelepiped with Edges on Three Skew Lines
Spherical Right Triangles
Spherical Cap and Ring
Intersection of a Plane and a Tetrahedron
Completing a Tetrahedron to a Parallelepiped
Dissection of a Spherical Triangle into Three Spherical Triangles around a Spherical Hexagon
Four Theorems on Spherical Triangles
Dissection of Three Regular Spherical Pentagons into Five Equilateral Spherical Triangles
Dissection of a Spherical Equilateral Triangle into Three Isosceles Triangles
Relations between Plane Angles and Solid Angles in a Trihedron
Supplementary Solid Angles for Trihedron
Swing-and-Twist Hinged Dissection of One Regular Heptagon into Seven
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