Not sure if I am in the right place, if not, hopefully this will get moved to the right place. My problem is that I am putting a quilt together, of 12 inch blocks, and I am setting them on point. So, I have these triangle pieces that I need to fill in around the edges, and the 4 corners. I know that there should be a formula, about cutting a square so much larger, and then cutting it into a triangle. Can anyone help me out? I could probably use newspaper, and come to a close answer, but if there is a formula, then I can write it in my book for future reference. Thanks for any help you can provide.