Some buildings not only have angled columns like these, but the columns "walk" from floor to floor, so there's always some overlap of the columns from floor to floor, some vertical transmission of the gravity load, but not completely, so the net result is a crazy stacking of pennies reaching amazing, seemingly impossible overhangs.

The way I find it helpful to think about these kinds of columns is to imagine wider columns only where there are wider balconies and longer cantilevers to support. You can then visualize the bigger columns on top of smaller ones, then topped again by smaller ones, like a narrow cylinder supporting a wide one supporting a narrow one. This way, you can imagine how the full volume of the bigger columns is actually not needed. Instead, the load shifts out towards the extended balcony/cantilever. Then, just remove the concrete you don't actually need, and use a constant diameter cylinder to form the column, and you get these angled columns.