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Triangles
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Demonstrations 141  160 of 466
Simson's Line
Twins of Arbelos and Circles of a Triangle
A Necklace of Equilaterals
Another Generalization of Pythagoras's Theorem
The Intersection of Two Triangles
Area of Triangles Formed by Tangents on the Reciprocal Curve
The Triangles Formed by the Endpoints and Midpoints of Cevians
SideSplitting Triangle Ratios
Largest Square inside a Triangle
Problems on Circles IX: Circumcircles and Incircles of a Triangle
An Angle Bisection
Three Concyclic Sets of Points Associated with the Orthic Triangle
Triangle Side Length Inequality
Drilling a Square Hole
Drilling a Triangular Hole
Boltyanski's Cake Problem
The Area of a Square in a Square
Triangle Area Bisectors
Da Vinci's Proof of the Pythagorean Theorem
How to Torpedo a Ship
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