1) These are the triangles you will use for this method. All of the outside edges are on the straight of the grain instead of the bias like in the tube method. This gives you less stretch.
Measure the length of the diagonal from edge of strip to edge of strip with another ruler.
Another method to determine the size of the square to cut is to take the width of the strip times 1.414.
If your strip is 6 3/4 " wide:
6.74 X 1.414 = 9.5445 or round to 9.5
(9 1/2")
3) Take the angle measurement and cut a strip of fabric the width of the angle measurement. You don't have to add a seam allowance here.
Cut the strip into squares
Cut the squares once on the diagonal.
You can use the "double ruler" method if your ruler isn't wide enough or if you don't have one of those big 16" square rulers (which I would highly recommend for any quilt "square up job" anyway.
It is really easy to figure out:
If you cut your strips from selvage to selvage and cut your squares using the diagonal measurement for the 6 3/4" strip sets (which *should* be 9 1/2") you will be able to get four squares across your strip. Cut each of them in half, and you have 8 triangles for your strip set blocks.
How many blocks are in your quilt?
Divide that by 8 (the number of triangles you can get from a strip
set)
Multiply that number by the width of your squares and that is how much fabric you will need for this method.
Example:
blocks in quilt = twin quilt with 60
blocks
60 x 9.5 (the width of your strips) = 570"
divide by 8 (the number of blocks from a strip) = 71.25"
convert to yards = 71.25 divided by 36= 1.97 yards for twin...
I would always get a little extra" just in case".
Both techniques work well, it just depends on you.
