Omnigrid makes a wedge ruler. Has lines for 9,10,18,22.5,36 and 45 degree angles. When I decided to do a Dresden style quilt I was thrilled to find this ruler. It is 6x24” and so much less expensive than buying a bunch of different fans.
I have only made one Grandmother’s fan quilt way back when Bethany Renolds(?sp) came out with the original Stack-n-whack book. I made the fans and appliquéd them to a block. Pretty heavy quilt but so much fun. I used a decorative stitch (Greek key) to stitch them down, it was the first for me quilt that I made.