A square dipyramid (bipyramid) has 6 vertices.
A pentagonal dipyramid (or bipyramid) has 15 edges, 10 faces and 7 vertices.
A hexahedron MUST have six faces since that is what the name means. It can have 5 vertices (triangular dipyramid), 6 vertices (pentagonal pyramid), 8 vertices (parallelepiped and similar)
It depends on the exact shape. An octahedron is a shape with eight faces. It can be a heptagonal pyramid (8 vertices, 14 edges), or a hexagonal prism (12 vertices, 18 edges), square dipyramid (6 vertices, 12 edges) are some examples. There are more.
A square has 5 vertices * * * * * A square has 4 vertices!
A square has 4 vertices
A square prism has 8 vertices.
A square pyramid has 5 vertices.
It depends on the configuration. Here are some: A nonagon-based pyramid will have 18 edges and 10 vertices; An octagon based prism will have 24 edges and 16 vertices; A pentagon-based dipyramid will have 15 edges and 7 vertices. There are others.
An icosahedron is a polyhedron with 20 faces. The number of vertices and edges is indeterminate because there are many possible configurations.Three examples:A pyramid with a 19-gon base: 20 vertices, 38 edges.A dipyramid with a decagon base: 12 vertices, 30 edges.A prism with 18-gon bases: 36 vertices, 54 edges.An icosahedron is a polyhedron with 20 faces. The number of vertices and edges is indeterminate because there are many possible configurations.Three examples:A pyramid with a 19-gon base: 20 vertices, 38 edges.A dipyramid with a decagon base: 12 vertices, 30 edges.A prism with 18-gon bases: 36 vertices, 54 edges.An icosahedron is a polyhedron with 20 faces. The number of vertices and edges is indeterminate because there are many possible configurations.Three examples:A pyramid with a 19-gon base: 20 vertices, 38 edges.A dipyramid with a decagon base: 12 vertices, 30 edges.A prism with 18-gon bases: 36 vertices, 54 edges.An icosahedron is a polyhedron with 20 faces. The number of vertices and edges is indeterminate because there are many possible configurations.Three examples:A pyramid with a 19-gon base: 20 vertices, 38 edges.A dipyramid with a decagon base: 12 vertices, 30 edges.A prism with 18-gon bases: 36 vertices, 54 edges.
A pentagonal pyramid, A rectangle based dipyramid, A triangular prism.
A square has 4 vertices.
There are 8 vertices.