nonagon
There can be no such shape.
An octagonal pyramid.
The shape would be impossible. The faces and vertices have to add up to two more than the edges.
The shape that has no vertices and is round is a circle. The circle is the only shape that does not have vertices.
A polygon with 9 vertices is a nonagon.
nonagon
Nonahedron
An octagonal pyramid
There can be no such shape.
pentagon
A triangular prism.
a triangular prism
It is a triangular prism that has 6 vertices, 9 edges and 5 faces.
a triangular prism has 6 vertices.
Since it has 9 faces it is a nonahedron. Not sure how many of the thousands of nonahedrons have 6 vertices.
An octagonal pyramid.