| If you're going to accept tetrahedral for tetrahedron, you may want to accept octahedral for octahedron. Also, if ammonia is trigonal pyramidal, then I see no reason why nitrogen trichloride should be any different. Nitrogen is still making 3 bonds and has 1 lone pair. Lastly, the answers you're asking for are technically geometries, not shapes. Shapes include the lone pairs, i.e., ammonia would be tetrahedral. |