hexahedron:
A hexahedron is a polyhedron six sides. With this number of heads is bound to be a convex polyhedron, and their faces are to be five-sided polygons or less. If the six square faces of the hexahedron are congruent, the hexahedron is called regular (often known as a hub body), then being a so-called Platonic solids
TETRAHEDRON:
A tetrahedron is a polyhedron with four faces. With this number of heads is bound to be a convex polyhedron, and triangular faces, three of them were found at each vertex. If the four faces of the tetrahedron are equilateral triangles, necessarily equal to each other, the tetrahedron is called regular. The tetrahedron is the three-dimensional simplex.
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dodecahedron:
A dodecahedron is a twelve-sided polyhedron, convex or concave. Their faces are to be polygon of eleven sides or less. If the twelve faces of the dodecahedron are regular pentagons necessarily equal to each other, the dodecahedron is convex and is called regular, then being a so-called Platonic solids.
A dodecahedron is a twelve-sided polyhedron, convex or concave. Their faces are to be polygon of eleven sides or less. If the twelve faces of the dodecahedron are regular pentagons necessarily equal to each other, the dodecahedron is convex and is called regular, then being a so-called Platonic solids.
Here some pictures:
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icosahedron:
An icosahedron is a twenty-sided polyhedron, convex or concave. Their faces are to be nineteen-sided polygons or less. If the twenty faces of the icosahedron are equilateral triangles, necessarily equal to each other, the icosahedron is convex and is called regular, then being a so-called Platonic solids. The conjugate polyhedron of the icosahedron is the dodecahedron.
Here some pictures:
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icosahedron:
An icosahedron is a twenty-sided polyhedron, convex or concave. Their faces are to be nineteen-sided polygons or less. If the twenty faces of the icosahedron are equilateral triangles, necessarily equal to each other, the icosahedron is convex and is called regular, then being a so-called Platonic solids. The conjugate polyhedron of the icosahedron is the dodecahedron.
Here some pictures:
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OCTAEDRO:
An octahedron is a polyhedron with eight faces. With this number of faces can be a convex polyhedron or a concave polyhedron. Their faces are to be seven-sided polygons or less. If the eight faces of the octahedron are equilateral triangles, necessarily equal to each other, the octahedron is convex and is called regular, then being a so-called Platonic solids.
Here some pictures:
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