The very first comment in this chapter, about how the rest of the book was presented in a "synthetic point of view" rather than one thick with coordinates, raised my curiosity on what the course would've been like if more emphasis had been place on coordinates and calculations.
Interesting how this chapter demosnstates techniques for creating semi-regular figures through slicing. Seems like the semi-regular figures bring together lots of the different aspects of polyobjects that we learned (duality, slicing, fold-outs, regularity, etc).