I think so, not sure if that is a formal name, or if that is what this particular person on that website called it. I have about figured it out, I want to make each block 10 by 10, but don't really know how to allow for seams. Like for instance, I need each outter triangle to be five inches, so I would need one five inch square of both fabrics I am using of each, but how much bigger should I make it for the seam allowance? 5 1/4 inch?