A Decagon.
* * * * *
There is no such shape in normal geometries. The only polyhedron with 4 faces is a tetrahedron and that has 6 edges.
a shape that has 9 faces
It is a triangular prism that has 5 faces. 6 vertices and 9 edges
You can't have a 3-d shape with only 2 faces. A triangular prism has 9 edges and 6 vertices, but it has 5 faces.
Triangular Prism
There can be no such shape.
Nonahedron
An octagonal pyramid
A triangular prism has 5 faces, 9 edges, and 6 vertices.
The description given fits that of a triangular prism which has 5 faces, 9 edges and 6 vertices
The shape would be impossible. The faces and vertices have to add up to two more than the edges.
triangular prism
An octagonal pyramid.