Speed piece the corner half squares, by stacking the blk. and yel. 2-7/8"
x 5-3/4" strips right sides together with all edges aligned. On
the back of the top strip mark the 2-7/8" square line and the
diagonals as shown at left. Sew a scant 1/4" above and below
the marked diagonals, pivoting at the square line. Cut apart on the
marked diagonals and on the square line. This will give you 4 half
squares. Press seam allowances to dark side. Trim these back to
measure 2-1/2" if needed.