When sewing six points together, sew the first three pieces and then the second three, and finally one straight seam will join the two halves together.
Begin by laying out the three pieces for the first half. Pick up piece A and, with right sides together, pin it on top of piece B.
Starting at the outside edge and sewing towards the center, sew just to the point where the seam allowance would cross, and take a small back-stitch. Do not break the thread.
Now take piece C and place it, right sides together, on top of piece B. You should be able to feel the ridge from the seam allowance with your thumbnail. Carefully bring the needle directly through the end of the last stitch it made, and through the base of the seam allowance. Take a back-stitch along the”ridge, and then continue sewing this last piece.
Sew the other three pieces in the same manner so that you now have two halves.
Check to make sure that the point in the middle of each half is securely bounded by the points on either side. If the point is not neat and sharp at this stage, it will not be neat and sharp when the two halves are sewn together.
Place the two halves together with right sides facing each other, making sure that the points of the center piece in each half meet exactly. Place a pin through the point.
Sew from the edge towards the center. As you reach the center, carefully pull out the pin, bring all the seam allowances towards the left.
Sew up to the seam line, making sure not to catch any of the seams in the stitches. Take a back-stitch at the center and then pass the needle through the base of the seam. Now pull all the seams towards the right, take another back-stitch right next to the seam, and then continue sewing across.