yes, you are right but it's easy to do. this has been discussed often here. circles made, sewn together and edges folded to make "petal" look. orange peel is one name, robbing peter to pay Paul, and others.
i will find the recent discussion. well can't find the recent one. it was titled something different. here is one
http://www.quiltingboard.com/main-f1...s-t159374.html
http://www.justitdist.com/brandys5.htm
this shows on the bottom (scroll way down) the circle template with square inside that you would need or make one up like to do this method. youtube must have something too on this. circle majic is what the template is called from brandysquilts.com
reversible circles with a slit cut to turn right side out, etc.
got it!! this shows how to do it
http://www.reddawn.net/quilt/circle.htm