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.
Alexander Gaifullin says that there are other types of polyhedra - flexible polyhedra.
To illustrate the usual polyhedron, Alexander uses the icosahedron assembled from our set "Magic Edges"!
Used materials video project "Postnauka" (http://postnauka.ru/).
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