Idan Tal – 資源 – GeoGebra

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認識 GeoGebra App

Octants
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Idan Tal
Twelve rhombuses in a cube
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Six regular decagons in a dodecahedron form a icosidodecahedron
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Regular hexagon cross-sections of a dodecahedron
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Four regular hexagons in a cube form a cuboctahedron
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The stellated rhombic dodecahedron
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Compound of three octahedra
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Compound of five tetrahedra
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Compound of two tetrahedra
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Compound of five cubes
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Expansion of a rhombic dodecahedron
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Progressions between an octahedron, pseudoicosahedron and cuboctahedron
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Cuboctahedron
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Snub Cuboctahedron
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Transformation from a Cube to a Rhombic Triacontahedron
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Dancing Points on Regular Polygons
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Morphing Polyhedron
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reflect image
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An angle bisector of a triangle and an harmonic mean
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A tangent to an ellipse and chords with their midpoints parallel to it
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A parallelogram that inscribes an ellipse and an inner parallelogram inscribed in it
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The chord that connects the tangency points of two tangents that are parallel to the ellipse passes through the center of the ellipse
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A billiard table for illustrating the ellipse inscribed in a rectangle
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Presentation of the locus of the foci of an ellipse rotated inside a rectangle
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