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# How many of these polyhedra?

The right is called a convex polyhedron, if all its faces are the same regular polygon and all the angles at the vertices are equal. There are only five:

1. the tetrahedron is the right tetrahedron (faces - 4 right triangle), 6 edges and 4 vertices.
2. exaet - right hexahedron, or cube (edge - 6 correct quadrilaterals (squares), 12 edges, 8 vertices;
3. the octahedron is the right octahedron (faces - 8 right triangles), 12 edges and 6 vertices;
4. the dodecahedron is the right octahedron (faces - 12 correct pentagons), 30 edges and 20 vertices;
5. the icosahedron is the right an icosahedron (faces -20 right triangles), 30 edges and 12 vertices.  Tetrahedron  Exaet (cube)  The octahedron  Dodecahedron  The icosahedron     Please rate the answer:
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Total votes: 15

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