I have a cog image that has rounded points for it's teeth - I want to convert
the rounded points to a square edge. Using macromedia fireworks, I used a 10-sided auto shape star as the base, then a circle on top of the star, combined them with "union", and lastly, "punched" a hole in the center of the circle/star.

The only thing I have left to do, is convert the star corners from rounded points, to a square edge. Does anyone know how to do that?