A nonahedron.
There are many possible configurations: the simplest two to visualise are an octagonal based pyramid and a heptagonal prism.
Nonahedron
Since it has 9 faces it is a nonahedron. Not sure how many of the thousands of nonahedrons have 6 vertices.
Triangular prism
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
It is a triangular prism that has 6 vertices, 9 edges and 5 faces.
Nonahedron
Nonahedron.
An octagonal pyramid.
The 3d shape that have five faces would be a triangular prism **************** or a pyramid
Since it has 9 faces it is a nonahedron. Not sure how many of the thousands of nonahedrons have 6 vertices.
Triangular prism
A triangular prism
3d shape Well actually it is a Cube
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
A Pyramid is a 7 lettered 3D shape with triangular faces.
a sphere
An icosahedron is a polyhedron has 20 faces, and is a 3D shape.