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Demonstrations 21 - 40 of 2025
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
Regular Spherical Polygons
Optimal Volleyball Spikes and Blocks
Regular Tetrahedra Formed by Lattice Points Equidistant from the Origin
Random Cuboid-by-Cuboid Construction of 3D Cellular Automata
Fate of the Euler Line and the Nine-Point Circle on the Sphere
Spherical Law of Sines
Spherical Law of Cosines
Swing-and-Twist Hinged Dissection of One Regular Heptagon into Eight
Dissection of an Equilateral Spherical Triangle into Two Congruent Equilateral Spherical Triangles
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