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Geometry
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Demonstrations 2401  2420 of 3134
Estimating the Surface Area and Volume of a Rectangular Prism
Virtual Flowers with Crispate Petals
The Product of the Distances of the Incenter to the Vertices
Ellipse and Friends
Recursive Exercises II: A paradox
Variations on a Tetrix
Estimating the Side Length of a Square from Its Area
Recursive Exercises I
Tiles around a Swimming Pool
Volume of Triangular Prisms
Normal Lines to a Parabola
Albrecht Dürer's Pentagon of 1525
Simple ThreeLetter Cube
The Second Lemoine Circle
Moving the Vertices of the Great Rhombicuboctahedron
Conic Sections: The Double Cone
Liquids in Containers of Different Shape
Feuerbach's Theorem
The Center and Radius of the NinePoint Circle
Classifying Quadrilaterals
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