I have a program called "Triangulations" written by Brends Henning; Bear Paw Productions, www.bearpawproductions.com
It is great for making different size triangles. It is done by printing the triangle design on thin paper then putting two pieces of material on top of one another then the paper, then you sew on the sewing lines, then cut on the cutting lines. You then have triangles with two different material. Depending on the size of the triangles, I have made 8 at a time.
Barbara