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Triangles
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Demonstrations 181  200 of 450
Another Triangle into Hexagram Dissection
Hinged Dissection of an Equilateral Triangle into Two Hexagons
Hinged Dissection of an Equilateral Triangle into a Hexagram
Generator of Pythagorean Triples
Similar Right Triangles
Total Areas of Alternating Subtriangles in a 2ngon
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
Equilateral Triangles That Form a Star
Sum of a Geometric Series
Circumcenter of a Triangle
Interior Angles of a Triangle
Area of a Disk
Altitudes and Incircles
A Collinearity Involving an Excircle, the Incircle, and the Circumcircle
The Desargues Configuration
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
Products Determined by a Point on the Circumcircle
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