In sketcher; draw any polygon with the polygon tool, then do a window select of the entire polygon and click "toggle to construction mode". What was a blue circle with a white polygon is now a white circle with a blue polygon. We now have constrained control points. If you do a polygon to the Nth of 36 you get 10 degree constrained increments. I thought this was worth some words.

... an interesting case study!

(Inverting the construction mode) and deleting the circle

with additional constraints you get any polygon with equal edges. (star a.s.o.)

(Inverting the construction mode) and deleting the circle

with additional constraints you get any polygon with equal edges. (star a.s.o.)