 We can repeat these same analysis for three dimensions. In three dimensions, you can construct shapes. But if you just construct it from lines and angles, then the shape that you obtain will be two dimensional. These platonic solids or the 3D versions of regular polygons can be classified based on the shape of the face of the platonic solid. It's called a tetrahedron because tetram is four and hydron is face. All edges are identical, all faces identical, and all vertices identical. Properties, which means they'll arrange themselves in such a way that no single orbital is experiencing a greater or lesser force due to surrounding on it. I have here a 3D model of a dotica neutral. Symmetry and identical nature of all the silks and faces of a platonic solid.