It can have up to the number of sides on the base, but it need not have any.
there are two plane symmetry on triangular prism.
2
3
Three.
This depends on the type of prism. If the shapes on the ends are pentagons, the prism has 6 planes of symmetry. If they are hexagons, it has 13 planes of symmetry. It has the same number of planes of symmetry as the shapes on the end have lines of symmetry, plus 1.
2
Three.
Triangular Prisms don't have any vertical edges
five
The answer is 13- for more detail:
A pentagonal prism has 7 faces, 15 edges and 10 vertices
n+2. The sides will compose all the planes perpendicular to the two bases of the prism.