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.
the names of them are semiregular polyhedron
A prism is a polyhedron with two parallel bases bounded by congruent polygons and with lateral faces bounded by parallelograms that connect the corresponding sides of the bases. The height of a prism is any perpendicular line drawn from a point on one base to the other base. If the the bases' shape of a prism is a triangle, we call it a triangular prism (it has 3 faces). The surface area is the sum of the bases' area and the faces' area (lateral area).
Yes, it is.