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Plane Geometry
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Demonstrations 1  20 of 1310
A Lemma in Geometry Concerning Points Generated by the Incircle of a Triangle
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Ison Triangles
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Dissecting One Isonona Triangle into Two
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Isonona Triangles for 3D Printing
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FourPoint Parabolas
First Fermat Point and Isogonic Center of a Triangle
Apollonian Edge Circles
A Visual Proof of Ptolemy's Theorem
Concurrence of the Median, a Chord and a Diameter of the Incircle
A Concurrence Based on Ellipses through the Incenter
Swerve Drive Robot
Center of a Golden Rectangle
Mamikon's Method for the Area under a Parabola
Squares on the Sides of a Quadrilateral
Areas of Squares from the Pedals of a Triangle
Smallest Circle Problem
Center of Gravity of an LShaped Sheet and the Golden Ratio
Mamikon's Method for the Area of the Cycloid
Area of an Inscribed Triangle in Terms of the Product of Its Sides
Observed Distribution of Random Chord Lengths in a Circle
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