Originally Posted by SWEETPEACHES
I'm sorry. I don't mean to beat a dead horse.
I don't know how to read the chart, however, I did cut two 6 1/2" squares, sew them around all sides, cut in quarters diagonally, press open, sew them together and got an 8" pinwheel. ok, I get that.
What I don't understand is the math. IF I want to end up with a 6" pinwheel (all 4 pieces sewn together, but not sewn to other blocks, how do I figure out what size squares to start with before any sewing around the perimeter. (let's say my quilt top is going to have a 6" solid square, then a 6" pinwheel block, then another 6" solid square, and another 6" pinwheel block.. you get the idea)
Thank you. (this is going to be a post and run. it's midnight here!) I'll check back tomorrow.
If I am understanding it correctly, I think it is saying this:
If you layer "two" 2" squares, sew a 1/4" around, then cut each from corner to corner, you will end up with "four" 1" HST.
If you layer "two" 5" squares, sew 1/4" around, then cut each from corner to corner, you will end up with "four" 3 1/2" HST.
So, the first number in the chart represents the size of the "two"squares that you will layer together. The second number in the chart represents the size of the "four" HST you will end up with after cutting corner to corner.
Here are two links to two more charts, the second link has a picture and explains the math a bit more, so you may understand it better.
http://www.moonlightquilters.org/tipHSTfav.htm
http://whipup.net/2011/03/17/guest-b...are-triangles/
The sizes in each of these charts seem to vary slight from each other. I think I would test it out on my own first to see what sizes I end up with. We all vary in our cutting, sewing, pressing, etc.
I am wanting to try out this technique myself.