They don't have names beyond "the faces of the tetrahedron."
The faces do not have specific names.
They do not normally have names!
There are 3 rectangular faces and 2 triangular faces. The triangles are the bases.
diamond/octahedron
There are no specific names for the faces.
There are 4 triangular faces. They do not have names.
They don't have names beyond "the faces of the tetrahedron."
A sphere has a surface but no faces.
They do not have names.
The faces do not have specific names.
Faces and Names - 1999 was released on: USA: 1 November 1999
The edges of facets -- where facets meet would be called by a geometric name: angle. You can read more about the names of cuts and their component faces/ facets, below.
I deleted the answer. In your faces.
They do not normally have names!
There are 3 rectangular faces and 2 triangular faces. The triangles are the bases.
diamond/octahedron