A pentahedron.
The answer is a polyhedron
icosahedron (its a 20 sided trinagular faced polyhedron)
Octahedron
octahedron
An 8-faced 3D shape is called an octahedron. It is a polyhedron with eight triangular faces, 12 edges, and six vertices.
A pentahedron.
A tetradecachedron is a polyhedron, also known as a 14-sided polyhedron or 14-faced polyhedron. It is a convex solid with 14 faces, 24 edges, and 14 vertices. The term "tetradecachedron" can refer to any 14-faced polyhedron, not necessarily a specific shape.
A dodecahedron is a twelve-faced polyhedron.
A regular octahedron.
The answer is a polyhedron
icosahedron (its a 20 sided trinagular faced polyhedron)
Octahedron
octahedron
i
Octahedrons.
A polyhedron is any multi-faced solid. In order to know how many pairs, you need to know how many total faces.