If that shape is a polygon then its named an octagon.
A cube has 6 sides 8 verticies and 12 edges
The question is ambiguous. An octagon is a 2-dimensional shape with 8 edges and 8 vertices. Does a 3-D octagonal shape mean one with 8 edges or 8 faces or vertices, or faces which are 2d octagons?
A shape with 8 sides is an octagon
There is not a polyhedron with the given number of faces, edges and vertices.
an octogon
an OCTAGON
the shape that has 8 faces , 18 edges , and 12 vertices is simply a hexagonal prism not a pyramid my butt :P
It is a cube or a cuboid which also has 12 edges and 8 vertices
A parallelepiped, of which a cube is a special case.
An Octagon
the answer is a square pyramid
A U shaped room has 8 edges on the floor, 8 on the roof and 8 vertical edges, making 24