for setting triangles- measure the size of the block you want to put on point- multiply that number by 1.141 round up- if it's an odd-ball decimal number- add 1 1/4" to the multiplied total- that is the size square to cut- cut this square in 1/2 diagonally- in both directions for 4 setting triangles- this will give you your needed 1/4" seam allowance at your points.