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Demonstrations 21 - 40 of 271
A Triangle Formed by the Centers of Three Circles
Concurrency Induced by a Cevian
Three Circles Defined by Chords
A Line Associated with an Excircle
An Infinite Knight's Tour
Total Areas of Alternating Subtriangles in a 2n-gon
Intersection of an Altitude and a Line through the Incenter
Rhombi at the Incenter of a Triangle
Tangents to the Incircle from a Point on the Circumcircle
Quicksort versus Selection Sort
Altitudes and Incircles
A Collinearity Involving an Excircle, the Incircle, and the Circumcircle
Points Symmetric to the Orthocenter with Respect to the Sides of a Triangle
Reflections of a Point in the Midpoints of a Triangle's Sides
Three Circumcenters Concyclic with a Fourth Point
Products Determined by a Point on the Circumcircle
Division of an Angle Bisector by the Incenter
Perpendiculars from a Point on the Line between the Endpoints of the Angle Bisectors
Concyclic Points Associated with an Angle Bisector and an Excircle
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