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Triangles
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Demonstrations 321  340 of 565
Division of an Angle Bisector by the Incenter
Drilling a Hexagonal Hole
Perpendiculars from a Point on the Line between the Endpoints of the Angle Bisectors
Concyclic Points Associated with an Angle Bisector and an Excircle
Dividing a Triangle by Lines Parallel to Two Sides
Subtriangles Formed by Concurrent Lines Parallel to the Sides of a Triangle
Reflecting a Point through the Midpoints of a Triangle's Sides
Equal Chords
The Area of the Incentral Triangle
A Concurrency from Circumcircles of Subtriangles
A Concurrency from the Midpoints of Line Segments through the Circumcenter
A Concurrency from the Reflections of the Contact Points with the Excircles
A Concurrency from a Point and a Triangle's Excenters
Concyclic Points from Reflections of the Circumcenter about the Altitudes
Collinearity of a Triangle's Circumcenter, Incenter, and the Contact Triangle's Orthocenter
The Schiffler Point
A Concurrency Generated by Lines through the Orthocenter and Circles about a Triangle's Sides
Another Concurrency Generated by Circles about a Triangle's Sides and Lines through an Internal Point
A Concurrency Generated by Circles about a Triangle's Sides and Lines through an Internal Point
A Circumcircle through the Midpoint of a Triangle's Side
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