Because the literal meaning of polyhedron means 'many faces' A sphere has only one face.
A cone.
it is a term for a face , its different for all, if the polyhedron is based off a 2d polygon, it is the side with that shape(usualy)(their may be more than one)
A pyramid has a polygonal base with all other sides being triangles. As the Egyptians famously demonstrated, a common pyramid has a square base with four triangles meeting at a vertex, but any polygon - regular or irregular - can be used as the base of such a polyhedron.
The faces in a 3-D shape (polyhedron, for example) are bordered by edges.
A tetrahedron.
Tetrahedron
A polyhedron has only polygonal faces and any one of them can be considered a base. Therefore a polyhedron with 0 bases cannot exist.
Yes, a polyhedron is only made up of one base which is bordered by straight lines. Each face is in fact a polygon, a closed shape in the flat 2-dimensional plane made up of points joined by straight lines.
Because the literal meaning of polyhedron means 'many faces' A sphere has only one face.
It is a pentagon.
It is a pentagon.
A cone.
It depends on which method of tag you are playing
This is a "trigonal pyramid" or "tetrahedron."
A one-hundred sided polyhedron is called a hecatohedron, comming from the Greek Hecto- meaning one-hundred and -hedronmeaning a three-dimensional figure.
That seems to fit the description of a pyramid