| With his geodesic dome, Fuller began to express a favorite geometric shape of his, the tetrahedron, and he put it everywhere he could. |
| The tetrahedrite crystal on this specimen is a simple tetrahedron with very smooth, clean crystal faces and a bright, shiny metallic gray color. |
| The strongest and most stable molecular structure is the three-dimensional tetrahedron, the configuration achieved with silicates. |
| Quartz crystals are silicon atoms surrounded by a tetrahedron of oxygen atoms linked at shared corners. |
| If each face is an equilateral triangle, the result is a regular tetrahedron, one of the five Platonic solids. |
| The four C-H bonds are directed towards the four corners of a tetrahedron, with carbon at its center and hydrogens at each vertex. |
