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Triangles
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Demonstrations 641  660 of 739
Barrow's Inequality
The Taylor Circle
The Circumcircles of Four Triangles
A Congruent Angle inside the Incircle
The Area of a Triangle inside the Incircle
The Radii of Four Incircles
A Relation between Altitudes of Four Triangles
A Relation between the Contact Triangles of a Triangle
A Parallelogram Defined by the Centers of Four Incircles
A Relation between the Areas of Four Triangles
Three Subtriangles of a Triangle
A Triangle and an External Contact Triangle
Contact Triangles of a Triangle
Tangents to an Excircle
Lines Parallel to the Sides of a Triangle
Area of a Triangle inside the Incircle
Adams' Circle and the Gergonne Point
A Rotating Reuleaux Triangle
Cofunction Identities for Sine and Cosine
Incircles and a Cevian
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