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A decahedron is a closed 3-D shape with ten polygonal faces. There are 32,300 topologically different decahdra and, since none of these are regular, the term is ambiguous. Some simple decahedra are:
- nonagon-based pyramid
- octagon-based prism
- square antiprism
- pentagonal dipyramid.
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What is a octa-decahedron?
well judging by the previx octa and the sufix decahedra, i'd say that its a 3-dimensional irregular decahedron that's made up of octagons.
What is a Tecahedron?
If you mean a decahedron then it is a polyhedron with 10 faces
How many verticies are on a pentagonal decahedron?
A dodecahedron has 12 equilateral pentagonal faces. From this, it has 30 edges as well as 20 vertices in its shape.
What is a regular decahedron?
None of the 32,300 topologically distinct decahedra is regular.
Number of faces and edges and vertices of a decahedron?
A decahedron is a polyhedron with 10 faces. There are several versions of a decahedron, but none of these are regular. By definition, they all have 10 faces. There is the octagonal prism - with 24 edges and 16 vertices, the square anti-prism, with 16 edges and 8 vertices, the square cupola, with 20 edges and 12 vertices, the pentagonal bi-pyramid, with 15 edges and 7 vertices and the augmented pentagonal prism, with 19 edges and 11 vertices. See, for example, http://en.wikipedia.org/wiki/Decahedron
