Tutorial With the iron set to the Wool temperature setting, place the SQangle template face down on the wrong side of the lighter colored fabric. Place the light fabric with the transferred SQangle lines on the darker fabric – right sides together. With right sides of your fabric together, sew on the dotted lines. Cut on the solid horizontal lines. Cut on the solid vertical lines. Cut on the diagonal solid lines. Press each triangle open and you have lots of Super Quick and highly accurate half square triangles.