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
If you add the vertices and Faces and subtract 2 from that number you get the number of edges. Vertices+Faces=Edges+2
A sphere- there are no faces, edges or vertices
It has 7 faces, 15 edges and 10 vertices
A dodecahedron has 12 equilateral pentagonal faces. From this, it has 30 edges as well as 20 vertices in its shape.
It has 14 Faces, 24 Edges, and 12 Vertices
They do not normally have names!
In geometry, a decahedron is a polyhedron with ten faces. There are 32300 topologically distinct decahedra and none are regular, so this name is ambiguous.One regular decahedron is an octagonal prism. Along with its 10 faces, it has 16 vertices and 24 edges.
If you add the vertices and Faces and subtract 2 from that number you get the number of edges. Vertices+Faces=Edges+2
A sphere- there are no faces, edges or vertices
It has 7 faces, 15 edges and 10 vertices
A dodecahedron has 12 equilateral pentagonal faces. From this, it has 30 edges as well as 20 vertices in its shape.
Faces + Vertices = Edges + 2
Sphere ( 0 faces , 0 edges , 0 vertices )
There is not a polyhedron with the given number of faces, edges and vertices.
A cube and a regular octahedron have the same number of edges, vertices, and faces. Both have 12 edges, 8 vertices, and 6 faces.
A decahedron is a shape with ten plane faces. There are 32,300 topologically distinct configurations. Some of the simpler ones are: pyramid with a nonagon base (Faces = 10, Edges = 18, Vertices = 10) prism with octagonal bases (F = 10, E = 24, V = 16) dipyramid with pentagonal base (F = 10, E = 15, V = 7).
for any prism , number of ___ + number of vertices = number of edges + ___