A tetrahedron or triangular pyramid.
A sphere has one continuous curved surface, so it technically does not have "faces" in the same way that polyhedra do. However, if you consider the surface as a whole, it can be referred to simply as the "surface of the sphere." In contrast, polyhedra have flat faces, edges, and vertices, which are not applicable to a sphere.
There are many such polyhedra. See the link below. The classification and naming of polyhedra is not wholly satisfactory so it is not possible to simply provide a list of names.
Bipyramids are a class of polyhedra with more faces than vertices.
The simplest stellated polyhedral shape is the stellated tetrahedron with 12 faces (3 * 4) Others have more faces.
There are only 5 regular polyhedra: those with 4, 6, 8, 12 and 20 faces. If you know of 7 polyhedra there may be a Fields Medal (the Nobel prize for mathematicians) for you!
Polyhedra are named by the number of faces they contain. The names are based on Classical Greek. Over time, some polyhedra have become known by common, non-Greek names, i.e. a regular hexahedron is commonly called a cube.
They are called "faces".
A sphere has one continuous curved surface, so it technically does not have "faces" in the same way that polyhedra do. However, if you consider the surface as a whole, it can be referred to simply as the "surface of the sphere." In contrast, polyhedra have flat faces, edges, and vertices, which are not applicable to a sphere.
There are many such polyhedra. See the link below. The classification and naming of polyhedra is not wholly satisfactory so it is not possible to simply provide a list of names.
Bipyramids are a class of polyhedra with more faces than vertices.
The simplest stellated polyhedral shape is the stellated tetrahedron with 12 faces (3 * 4) Others have more faces.
There are only 5 regular polyhedra: those with 4, 6, 8, 12 and 20 faces. If you know of 7 polyhedra there may be a Fields Medal (the Nobel prize for mathematicians) for you!
Regular polyhedra have identical faces.
The 3D shapes that have all their faces equal to their base are known as regular polyhedra. Specifically, these include the tetrahedron (4 triangular faces), cube (6 square faces), octahedron (8 triangular faces), dodecahedron (12 pentagonal faces), and icosahedron (20 triangular faces). Each of these shapes features congruent faces that exhibit symmetry.
There are a few families of polyhedra with identical faces. There are none whose faces have 6 or more sides. There is no special name for polyhedra whose faces are pentagons or pentagrams. A dodecahedron is an example. If coplanar faces are disallowed, the only polyhedron with quadrilateral faces are the cube and rhombohedron. There are infinitely many polyhedra with equilateral triangular faces: the tetrahedron, octahedron and icosahedron are examples.
Strictly speaking, no. But, as the number of faces increases, polyhedra can approximate cylinders or spheres and so can "roll".
dodecahedron