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Geometry
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Demonstrations 2061  2080 of 2831
Bisecting a Line Segment through the Orthocenter
Truncated Octahedra Outer Totalistic Cellular Automaton
A Collinearity from the Medial and Excentral Triangles
Rhombic Dodecahedra Totalistic Cellular Automaton
Circumcircles Intersecting at the First Fermat Point
Collinearity of an Incenter and Two Circumcenters
A Hexagon with Opposite Sides Parallel
The Product of the Perpendiculars to the Sides of a Triangle
Tangents to the Circumcircle at the Vertices
Displacement versus Distance
The Orthocentroidal Circle
Pairwise Tangent Circles Centered at the Vertices of a Triangle
The Area of the Pedal Triangle of the Centroid
The Square of a Median in Terms of the Triangle's Sides
Problems on Circles II: Halving a Set of Points
Volume of Cones, Pyramids, and Spheres
Bisection of Segments by the Sides of a Triangle
The Sum of the Squares of the Distances from the Vertices to the Orthocenter
The Orthocenter of the Medial Triangle
Four Collinear Points Related to the Altitudes
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