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Triangles
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Demonstrations 101  120 of 450
Rotating Polygons
nSectors of the Angles of a Triangle
Approximate Area and Circumference of a Circle Using Isosceles Triangles
Thales's Theorem: A VectorBased Proof
ConstantSum Figures
Four Lines and Four Circumcircles
The Malfatti Squares
Ball Bearings
Twin and Nearly Twin Pythagorean Triples
The Fuhrmann Circle
Pythagorean Primitive Triples Using Primes
Pythagorean Theorem
How Many Right Triangles Can You Find?
The Medians of a Triangle Divide It into Three Smaller Triangles of Equal Area
Trisectors and Circumcircles
Pompeļu's Theorem
Equal Incircles along a Line
The Medians of a Triangle Are Concurrent: A Visual Proof
The Centroid of a Triangle Divides Each Median in the Ratio 1:2
Simson's Line
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