Sewing trim on a triangle
I'm having the worst time trying to figure out how to sew a ribbon trim on a triangle! It's a wide ribbon (about 5") that I've folded in half so the trim will show on both sides. Can someone please tell me what to do when I get to the "V" at the bottom so there's a verticle fold? I've tried and tried but it looks like it's just not going to happen for me! Surely there's a way! Or will I have to cut and stich it rather than attempt the folded crease? I'm sewing ribbon on the two sides only (no trim across top)and have become brain-dead when I get to the bottom. Thanks for your help!