Yes
8
4
It is still a polyhedron. It may or may not still be a prism.
A triagular prism has 5 faces, 9 edges and 6 vertices
imagine a bunch of triangles stacked
It is a triagular prism
all of its edges are straight
yes
Yes, a trapezoidal prism is a polyhedron. A polyhedron is a solid three dimensional object with flat face, straight edges and sharp corners.
Yes, it is.
yes it is
no