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Triangles
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Demonstrations 21  40 of 499
Spherical Law of Cosines
Dissection of an Equilateral Spherical Triangle into Two Congruent Equilateral Spherical Triangles
Sines of the Dihedral Angles of a Tetrahedron
Rotation of the Euler Line of a Triangle
Tetrahedron Centers
The Klein Configuration
A Tetrahedron with Edges of Given Length
Recursive Similar Triangles
Construction for Three Vectors with Sum Zero
An IMO Triangle Problem
Maximal Unit Lengths in 3D
Fair Sharing of an Equilateral Triangular Pizza
Spherical Triangle Solutions
Wheels of Powered Triangles
Rational Distance Problem
Triangle Radicals
Congruence Classes of Geoboard Triangles
Triangle Altitudes and Circumradius
Folding a Strip to Converge to an Equilateral Triangle
Arbitrary Curves of Constant Width
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