A polygon with 9 vertices and 9 sides is a nonagon.
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
a triangular prism
pentagon
A triangular prism.
There can be no such shape.
a triangular prism has 6 vertices.
It is a triangular prism that has 6 vertices, 9 edges and 5 faces.
Since it has 9 faces it is a nonahedron. Not sure how many of the thousands of nonahedrons have 6 vertices.
A nonagon is a two dimensional; figure with 9 vertices.