I tried to edit a previously created polygon in a sketch, but it does not appear to be editable. You can select the icon, but right clicking does not give an edit feature option.
I would think it should be editable.
You can dimension it and edit the dimension and it changes correctly, maintaining its shape, but you can not change the number of sides.
I have on several occasions found myself wanting to change the number of sides for appearance reasons, after having done extrusions on the geometry, only to have to delete and reenter the polygon and then re-extrude, just sayin'
