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Demonstrations 281 - 300 of 452
A Hexagon with Opposite Sides Parallel
The Product of the Perpendiculars to the Sides of a Triangle
Tangents to the Circumcircle at the Vertices
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
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
Equilateral Triangle to Square
The Area of the Excentral Triangle
The Product of the Distances of the Incenter to the Vertices
The Second Lemoine Circle
The Center and Radius of the Nine-Point Circle
The Distance to the Orthocenter
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