A square-based pyramid has, let's see, a top vertex, and 4 vertexes on its base (the part in the ground) for a total of 5 vertexes.
5
5 vertices
8 vertices.
2 - a Triangular Prism has 6, a Triangular Pyramid (Tetrahedron) has 4.
It is a cube or a cuboid
A cube has 6 faces, 12 edges, and 8 vertices.
6 faces, 12 edges, and 8 vertices.
A circle
An hexagonal cross-section prism has 8 faces, 18 edges and 12 vertices
None.A triangle (not traingle) has 3 vertices (not vetices).
3
hexagon