Sail Corner Patch

I came across a nice corner patch design guide. To do a simple radial corner panel take your clew, tack or head and measure down 2 inches and center this mark in the corner. This will be the point you rotate all patch panels.
Determine your corner length of the longest panel, say 24 inches. Cut about 10 panels - 4 inch x 24 inch. You then take each of these and pin at the corner (2 inch from corner mark from above). Fan out the 10 or so 4 x 24 panels until you get a radial corner patch to your liking. Where each crosses over on the edges will be where you cut to get a circular fan look or you can even do a curved cut edge. The cut line is where each panel crosses.
Practive with paper and a pin to fan out your rectangular panels. This design will give you a strong corner - where the pin is there will be 10 layers. Gives you plenty for a strong clew ring, etc.
If you do it correctly the patch should have the look of triangles, even though it is made from rectangular panels.