square based Pyramid
Well, a triangular prism has 5 faces and 6 vertices, but it has 9 edges. So I'm not sure.
a triangular prism yes indeed
A triangular dipyramid (two tetrahedrons or triangular pyramids stuck together) has 9 edges and 5 vertices. A parallelepiped (including cuboid) has 12 edges and 8 vertices
It is a triangular prism that has 5 faces, 9 edges and 6 vertices
A square pyramid.
Pyramid
square
Triangular prism of course!
square based Pyramid
Well, a triangular prism has 5 faces and 6 vertices, but it has 9 edges. So I'm not sure.
a triangular prism yes indeed
A triangular dipyramid (two tetrahedrons or triangular pyramids stuck together) has 9 edges and 5 vertices. A parallelepiped (including cuboid) has 12 edges and 8 vertices
A square based pyramid fits the given description
A square based pyramid has 5 vertices, 8 edges and 5 faces.
It is a triangular prism that has 5 faces, 9 edges and 6 vertices
A pentagon