kind of depends on how many you have to make, how many colors you are using. if real scrappy & using lots of colors--the method that works best is to*** cut 4"sq @ color, R sides together, draw line diagonally,sew 1/4" away from EACH side of this line,cut on line, press,trim to 3 1/2"**
if not scrappy, triangle paper works best for lots of the same colors. fin.3"
Missouri Quilt Co has good tute on making 4 at a time for a pinwheel block. apply to your situation.
the most time-consuming, easy to stretch is to cut 4"
triangles,cut in half diagonally,press, trim to fin.3 1/2"
good if really doing small scraps.
Try a method before you do a whole lot of them !
everyone likes a different way.
anyone else reading this, please check my math !!