Thanks for the link. I used in a different way. I just bought fabric for a one block wonder and wanted to figure out how many blocks I would need to cut to make a quilt. Well I printed out a template, adjusting the size to 1 inch and found out if my octagons were 12 inches, which is the size I want to make,I will need to cut 30 6 inch (unfinished) 45 degree triangles for a 60X72" quilt. Fabulous!