In a July 20, 2011 post, I showed you a quilt I made which included MANY half square triangles, or HST's. I made the quilt top in a class taught by Roxann O'Hare of The Cosmic Cow. http://www.facebook.com/pages/Cosmic-Cow/149605151761698
In that class, I gained confidence using the oversized square method for constructing half-square triangles (HST's), pictured above in a mini-tutorial. Here are the steps:
Join two oversized squares (I used a 7" square to create a finished 6" block for a charity quilt project).
Draw a line, corner to corner.
Stitch ¼" from the line on each side of the line. (Sewn line – drawn line – sewn line.)
Cut on the DRAWN line, leaving two triangles.
Press the seam to the dark side of each HST.
Trim to your desired size. If you have a ruler with a 45 degree angle line, that's super helpful. You can align that line with the center line of your block before cutting.
Voila! Perfectly-sized HST's.
Yes, it uses a bit more fabric, but the increased accuracy and decreased frustration are worth a few extra pennies, I think. With perfectly-sized HST's and a ¼" foot on my sewing machine, I'll be happier with my finished blocks, and my trusty seam ripper can spend more time in the sewing box!
LeAnn aka pasqueflower