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