The 3rd cut will match the 4 1/4 inch marks on the ruler and the 4th cut will match the 3 inch marks. Cut the 3 inch square into 1 1/2 inch squares. Easy. Always match the diagonal line on the ruler with the crease and check all points before cutting.
Now it's time to play with your block parts and arrange and rearrange until you are happy and sew them back together again. On this batch of blocks I am sewing a 3/8 inch seam for the 4 patch in the center that gives me a little more seam allowance for the first round of triangles and I should have square corners on all the 4-patches. --Ann--