QuiltingAndPatchwork.com 
Sewing triangles and getting all the points to match up is more difficult in some patterns than others and more challenging for some quilters than others. 
Penny Halgren, by popular request, has developed a tutorial with videos at her How To Quilt web site for making a quilt with triangles.
As Penny explains:
This quilt offers opportunities for different kinds of
triangles, and has given me a chance to try some different
methods for sewing them together that make your results
more accurate.
These methods don’t necessarily save fabric. But they do
save time and aggravation by making the resulting triangles
a little more perfect.
You may want to check out Penny’s …read more