1. Carefully compare the angles in five different sets of shapes: linear, bent, trigonal planar, trigonal pyramidal, and tetrahedral. Discuss any salient points or trends.
2. What sort of range of angles are present in each set?
3. Why do you think a specific angle is small while another is large?

Pertinent discussions can be found on pp. 9, 29, 129, 191, and 202.