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Triangles
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Demonstrations 181  200 of 452
Macaulay's Triangle and Trapezoid Hinged Dissection
An Intuitive Proof of the Pythagorean Theorem
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
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