It is still a polyhedron. It may or may not still be a prism.
the names of them are semiregular polyhedron
Yes.
yes it is
A triangular prism is a polyhedron. Polyhedra is a plural term.
Yes
yes
Yes, a trapezoidal prism is a polyhedron. A polyhedron is a solid three dimensional object with flat face, straight edges and sharp corners.
the names of them are semiregular polyhedron
Yes, it is.
yes it is
no
Yes.
Yes.
Yes.
yes
NO spelling
Yes