NO spelling
yes
the names of them are semiregular polyhedron
It is still a polyhedron. It may or may not still be a prism.
A rectangular prism is not considered a regular polyhedron because its faces are rectangles, which can vary in size and shape. A regular polyhedron, or Platonic solid, has congruent faces that are all the same shape and size. In the case of a rectangular prism, while it has six faces and is a three-dimensional shape, the faces can be different dimensions, making it irregular.
yes
Yes, a trapezoidal prism is a polyhedron. A polyhedron is a solid three dimensional object with flat face, straight edges and sharp corners.
A regular polyhedron (other than a hexahedron), any pyramid, as well as most irregular polyhedra.
Yes, it is.
yes it is
no
Yes.
Yes.