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Demonstrations 21 - 40 of 517
Spherical Cosine Rule for Angles
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
A Visual Proof of Thales's Intercept Theorem
Two Equidecomposable Triangles
Spherical Right Triangles
Dissection of a Spherical Triangle into Three Spherical Triangles around a Spherical Hexagon
Four Theorems on 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
Euclid's Formula and Properties of Pythagorean Triples
Gerwien's Simultaneous Dissection of Three Triangles of Same Area
Fate of the Euler Line and the Nine-Point Circle on the Sphere
Spherical Law of Sines
Spherical Law of Cosines
Dissection of an Equilateral Spherical Triangle into Two Congruent Equilateral Spherical Triangles
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