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High School Geometry
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Demonstrations 21  40 of 309
NinePoint Circle
Geometric Elements of a Circle
Sine, Cosine, and Tangent Using Ratios of Sides of a RightAngled Triangle
Triangle Circles and Spirals
Triangle to Parallelogram
Tangent Circle and Arbelos
Unfolding a Dodecahedron to Produce a Stage
Tube Made of Segments
Splitting a Cube
Spoked Wheel
Stairs from Cube
Rhombic Triacontahedron Built on a Cube
Polygon Spirals
A Device that Illustrates Pythagoras' Theorem
Five Circles and the Golden Ratio
Folding an Octahedron from Squares
Fractal Tetrahedron
Crane Model
Cogwheel Drive
Dissecting a Pyramid into Four Equal Pieces
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