Thread: Need help on triangle edge(??)-questions

I have some antique quilts with a triangle type edge (trim?) going all the way around the quilt. I'd love to try this technique, but I have no idea what it's called, so its hard to find a tutorial on it. Is it called something specific?I've enclosed a scan with the quilts. Looks like there are two different methods used- I have no idea what either one is called


Thanks for helping with another newbie question :-)