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Demonstrations 861 - 880 of 1229
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
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
The Circumcircle of the Orthocenter and Two Vertices and a Parallelogram
Orthocentre d'un triangle inscrit dans une hyperbole (French)
Hinged Dissections: From Equilateral Triangle to Square
Problems on Circles III: Apollonius's Problem
Problems on Circles I: Dissecting a Circle
Recursive Exercises IV: Rep-Tiles
Equilateral Triangle to Square
The Area of the Excentral Triangle
Problems on Circles IV: Circles Tangent to Two Others with a Given Radius
The Product of the Distances of the Incenter to the Vertices
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