Ok I have a guess, I think you want to flatten the cone section so you can derive a 2d pattern. There are plugins for this, here is a native solution. I took as single facet of your cone and laid it flat. Then I drew two lines on the long edges to find the new center and rotate copied the 16 faces around that center. Is this the idea?
Wedge (1).skp (42.6 KB)
