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first star shaped rhombic dodecahedron(challenging task called “the star”)

It consists of 6 symmetrical small bars of complex shapes which are combined together in the shape of a multi-faceted star. The task is to disassemble it into small parts and then assemble it back together and get the same figure. This “game” was produced in USSR and proved to be very popular.

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Archimedes

ARCHIMED (287 - 212 BC) - Ancient Greek mathematician, physicist and mechanic.

Archimedes is the author of numerous discoveries and inventions: machines for irrigating fields, a water-lifting mechanism (Archimedes screw), a system of levers, blocks for lifting large weights, military throwing machines, etc. During the 2nd Punic War, he led the defense of Syracuse. His throwing machines forced the Romans to abandon the attempt to take the city by storm and forced to go to the siege.

 

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Science and Life polyhedraThe article in “Science and Life” (1989, №6, Cherenkov A. Khramov V.) tells about an interesting way of making polyhedra.

Mathematicians have already proved the possibility of making 3D objects from a ribbon. You can see how to make a tetrahedron in Figure 1. The ribbon is folded according to the drawn lines, sides of equilateral triangles.

 
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Polyhedron  What is it

A polyhedron is a solid bounded by flat polygons, which are called faces.

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Young British designer, Richard Sweeney, creates amazing paper sculptures. It is interesting that regular polyhedra are the basis for many of them. On his website http://www.richardsweeney.co.uk  he even gives the names of regular polyhedra to the created geometric shapes.

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