Now trim off the end and then cut three pieces off that are 1 1/2" sections.
Mark the seam allowance on one and pin or tack it to another section. Sew them together and iron them open.
Trim the center section to 1" from the seam. And add the third one. Now trim the outer strips 1" from the seam.
You will get a square that is 2 3/4" square