Originally Posted by
candy_cane2011
Would you just make another disappearing 9 patch square and then use the ruler to cut it in half then sew it into the row?
Sew it into the row first, then sew the rows together. Trim the jagged edges after sewing the rows together making sure to leave the 1/4 inch seam allowance. If you cut the triangle in half you'll lose your 1/4 inch seam allowance along the outer edge.