Hexahedron
Hexahedron [ hɛksae dər ː ], from Greek hexáedron, " hexahedron " generally refers to a polyhedron with six boundary surfaces. Specifically, in particular in the context of Platonic solids, the term stands for the cube.
Number of hexahedral
There are infinitely many convex hexahedron. A distinction is made ( ie, after the underlying line graph ) only on the structure, as is for example a parallelepiped or a frustum of pyramid can not be distinguished with four-sided base surface of a cube, all of these, however, entirely of a pyramid with a pentagonal base. In this sense, there are only seven different types of convex hexahedron.
Cube
- Areas: 4,4,4,4,4,4
- 8 corners
- 12 edges
Pyramid with a pentagonal base
- Areas: 5,3,3,3,3,3
- 6 corners
- 10 edges
- Areas: 5,4,4,3,3,3
- 7 corners
- 11 edges
- Areas: 5,5,4,4,3,3
- 8 corners
- 12 edges
Double tetrahedron
- Areas: 3,3,3,3,3,3
- 5 corners
- 9 edges
- Areas: 4,4,4,4,3,3
- 7 corners
- 11 edges
This body has Chirality: There is a " manual left " and " right-handed " version, which emerge by plane reflection apart.
- Areas: 4,4,3,3,3,3
- 6 corners
- 10 edges
If one also considers non-convex hexahedron, so once the following three additional models were added.
- Areas: 4,4,3,3,3,3
- 6 corners
- 10 edges
- Areas: 5,5,3,3,3,3
- 7 corners
- 11 edges
- Areas: 6,6,3,3,3,3
- 8 corners
- 12 edges
Hexahedron in chemistry
- An organic compound that is built like a cube, the cube after the English (English for cube) named Cuban.
- Cubic crystal systems are found in the description of the geometrical structure of crystals, such as the salt (sodium chloride structure).