It is a nonahedron.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
A cube or a cuboid
A pentagonal pyramid.
A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
A six faced 3d shape is called a cube.
Decahedreon
It is a nonahedron.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
An 8-faced 3D shape is called an octahedron. It is a polyhedron with eight triangular faces, 12 edges, and six vertices.
tetrahedron is a 4 faced 3d shape.
It is called a trihedron. It does not exist.
Dodecahedron.
A cube or a cuboid
A pentagonal pyramid.
Triskaidecahedron
icosahedron