Possible Molecular Geometries of some common inorganic molecules composed of non~metals. Linear Bent Trigonal Planar Trigonal Pyramidal T-Shaped Square Planar Trigonal Bipyramidal Trigonal Bipyramidal is an arrangement of five electron pairs around a central atom. Three of the electron pairs, called equatorial pairs, define an equilateral triangle. the other two pairs, called axial pairs, lie above and below the plane of the triangle. If a molecule has nonbonding paires, they will occupy the equatorial positions. Octahedral Octahedral geometry is a molecule with eight faces and six vertices. Each face is an equilateral triangle. Tetrahedral Tetrahedral geometry is a molecule with four faces and four vertices. Each face is an equilateral triangle. Seesaw With this information and by looking at the three dimensional and rotating images of molecules found here http://www.molecularmodels.ca/molecule/Inorganic.htm, you should be able to determine their geometries.