Bjorn - I loved Trig in high school!!!
If you save then import as an .eps file that is the universally accepted extension that will work in any vector format for cutting. That seems to hold true for drawings generated in Illustrator CS2 and then opening in an older Corel, Flexisign, Casmate, Anagraph, Signlab, Gerber, Winplot, and or Omega programs.
A .jpeg is visible in anything but you cannot manipulate it as you can a vector file - nor output it to the cutter/plotter.
With that said, if you want a star let me know the distance between the two points on top, I'll construct one in my sign program and send as an .eps attachment to you. Or the diameter will work as well.
Or I can plot it on paper and send you the drawing.
Or for a few bucks I can cut you a paint mask and send that on it's way.
Or you can call me Ray, or you can call me.................