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Practical application of mathematics

When we demonstrate polyhedra assembled from the Magic Edges set, people often ask the same question - what practical application does it have?

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Flexible polyhedra

Can a polyhedron be curved? Perhaps this is some kind of mistake? Or maybe this is not a polyhedron? It turns out that there are flexible polyhedra.

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School projectIn the second half of the 19th century, a new way of teaching was born in the US schools - the project method.
According to this approach, only that which is useful to people, that gives practical results and is directed to the benefit of the whole society, is true and valuable.
For a child, cognitive activity and curiosity are enough for full intellectual development.
The child should acquire experience and knowledge by “doing”.
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Is it possible to conduct additional school classes in geometry collecting models of polyhedra? Of course.
We were invited to school number 2005 in Moscow to show how students from different classes independently produce polyhedrons from the Magic Edge sets.

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cut a triangle into parts

Is it possible to cut a triangle into such a number of parts so that one can put a square together?

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