Six more.
Six more.
octahedron
A heptahedron is one possible answer.A heptahedron is one possible answer.A heptahedron is one possible answer.A heptahedron is one possible answer.
No, a dodecahedron is a 3-dimensional shape. Some of the 6.4 million topologically distinct dodecahedra have only triangulat faces, there are many more in which some faces, but not all, are triangular.
Hexahedron
A dodecahedron is a polyhedron with 12 faces. There are 6,384,634 topologically distinct convex dodecahedra with 8 or more vertices. A hexagonal bipyramid, a dodecadeltahedron, a triakis tetrahedron are examples of dodecahedra all of whose faces are triangles. There are many more dodecahedra in which some, but not all, faces are triangles.
A shape that has more faces than an octahedron (which has 8 faces) but fewer faces than an icosahedron (which has 20 faces) is a dodecahedron. A dodecahedron has 12 faces, satisfying the condition of having more than 8 and fewer than 20 faces.
A polyhedron with 13 or more faces.
A dodecahedron
Dodecahedron.
dodecahedron
A polyhedron is a solid shape with four or more polygonal faces. A hexahedron is a solid shape with six polygonal faces and so is a particular type of polyhedron.