To determine the number of faces for common three-dimensional shapes, here are a few examples:
- Cube: 6 faces
- Rectangular Prism (Cuboid): 6 faces
- Sphere: 0 faces (a sphere has a continuous curved surface)
- Pyramid (with a square base): 5 faces (1 square base + 4 triangular faces)
- Tetrahedron: 4 faces (all triangular)
- Octahedron: 8 faces (all triangular)
- Icosahedron: 20 faces (all triangular)
- Dodecahedron: 12 faces (all pentagonal)
If you provide specific shapes from your document or context, I can give you a precise answer for each shape listed.