Originally Posted by
PaperPrincess
If you are making half square triangles (HST), then the seam goes right to the corner. When you trim them down, you put the 45 degree line of your ruler right on the seam, so you preserve the point.
Here is one of many you tube videos that shows making HSTs a bit larger, then trimming;
http://www.youtube.com/watch?v=OQq-5p8RCS8
Yes, it is VERY IMPORTANT to put the seam on the diagonal line. If you don't you WILL lose your points.