Previously I posted I needed help on side triangle I should have said corners for a 56 inch square. I have Carol Dorak's book and found a formula that works. I took 56 and divided it by 1.4142 and came out with 39.60 then added 7/8s so am going to cut a 42 inch square in half once (will make another 42 inch square too) for a total of 4 corners. I described my question incorrectly I needed corners not side triangles. Thanks for all the responses I really appreciate the help and suggestions. Ellie

Thanks for the formula, Denise

When you finish please post a pic.