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Triangles
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Demonstrations 301  320 of 739
Some Polyhedra with Identical Triangular Faces
Octahedra Constructed from Eight Identical Triangles
NonEuclidean Triangle Continuum
Doubling a Distance with a Compass
Maximize the Number of Vertices in an Equilateral Triangular Lattice
Triangulating Random and Regular Polygons
Area of a Triangle in the Poincaré Disk
Triangle Altitude
Japanese Theorem for Cyclic Polygons
Radial Tiling
Rotating Pythagoras
The Pedal and Antipedal Triangles
Exact Trilinear Coordinates
Orthologic Triangles
Generalized Straightedge and Compass Fractal
Da Vinci's Construction of an Ellipse
Signed 2D Triangle Area from the Cross Product of Edge Vectors
Three Proofs of the Pythagorean Theorem
Congruent Numbers
Halving the Perimeter of a Zigzag Polygon
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