A pentagon is a plane (2-dimensional) figure. It has only one face and that is pentagonal.
A pentagon based pyramid.
pentagon
6 faces
6
A pentagon has 0, but if you mean a pentahedron, then it depends on how you build it.
A pentagon has 5 edges and 5 vertices
Five (5)
there are 5 sides
If a shape has 5 faces, it's a pentagon.
rectangulr
An edge of a 3-d pentagon is the intersection of two of its adjacent faces.
It is a prism with a pentagonal cross-section