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Demonstrations 21  40 of 2355
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 CuboidbyCuboid Construction of 3D Cellular Automata
Fate of the Euler Line and the NinePoint Circle on the Sphere
Spherical Law of Sines
Spherical Law of Cosines
SwingandTwist Hinged Dissection of One Regular Heptagon into Eight
Dissection of an Equilateral Spherical Triangle into Two Congruent Equilateral Spherical Triangles
Build Your Own Spaceship
Wilhelmy Plate Apparatus for Measuring Surface Tension
Real Number Walks versus Algorithmic Random Walks
One Point Perspective
Molecule Construction Set
Dissection of a Spherical Square into Two Spherical Regular Pentagons
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