An eight-faced 3D shape is called an octahedron. Any 3D shape (polyhedron) ends in -hedron, just like any 2D shape (polygon) ends in -gon, and octa- means 8.
It is an octahedron. There are 257 topologically distinct octahedra: with 6 to 12 vertices.
an octahedron p.s i am only a small little girl so i migt get this wrong.
an eight sideded polygon is an octagon octa means 8 * * * * * Yes, that is an eight sided shape but the question asked what an 8 FACED shape was. The answer to the question that was asked is an octahedron.
A cube is one