Muriel, Who is doing the rotary cutting instructions??? Me !!!
Of course they are rotary cut. I'll give you a hint on the cutting. In a seam there are 2 threads + the fold. That takes up space from the 1/4 inch seam, so I ALWAYS cut my pieces a few threads larger and sew a scant 1/4 inch seam. Very rarely do I have a problem. I also measure often and use a slotted 1/4 " foot with a guide so I can make needle adjustments.