I recently posted my Drunkards Path Quilt which a lot of people liked but commented how difficult it would be to sew all the curves.
I cheated, you don't need to sew ANY curves using this method.
I used the following measurements.
Cut 1st fabric into a 7 inch Square, mark the centre.
Cut 2nd fabric into 4 3/4 inch circle mark the centre.
Make yourself a 4 inch circle template using cardboard (not too stiff)
Sew gathering stitches about 1/4 of an inch around the edge of the circle of fabric.
Place 4 inch template inside the circle of fabric pull up the gathering stitches so it folds over the edge of your template. Press. Carefully remove the cardboard template.
Place circle of fabric over square fabric (right sides facing up) lining up the centres.
Machine sew or hand sew circle to square then cut into four equal parts, VOILA, no curves to sew.
I told you I cheated, this method was invented by a lady in Western Australia many years ago.