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Jay Warendorff After work by: Antonio Gutierrez
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Demonstrations 1  20 of 38
An Angle Bisection
Three Concyclic Sets of Points Associated with the Orthic Triangle
The Line through the Incenter and Circumcenter
The Distances to the Incenter and Excenters from the Circumcenter
The Distance from the Circumcenter to an Excenter
The Product of the Circumradius and an Exradius
Another Relation between the Areas of Triangles Associated with an Excircle
On the Areas of Triangles Associated with an Excircle
The Sum of the Circumradii of Three Subtriangles
The Sum of the Square Roots of the Areas of Three Subtriangles
The Sum of the Perimeters of Three Subtriangles
The Semiperimeter and Tangents to Excircles
Two Midpoints of a Trapezoid
Relations between Some Triangles Associated with Excircles
The Extouch and Intouch Triangles of a Triangle
A Parallelogram Defined by the Centers of Four Circumcircles
The Contact Triangle and Two Other Subtriangles
The Circumcircles of Four Triangles
A Congruent Angle inside the Incircle
The Area of a Triangle inside the Incircle
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