mine's a 10 degree but works the same way--just means 36 strips instead of 40 for the complete circle. I've done both the one that looks like giant Dresden and (more fun) the one on the back of the packaging that you make a strip set and then cut (flipping ruler back and forth) so that when you put them together you get a spiral bargello effect. Very simple to do both. unfortunately both gifted and didn't keep pictures of them