this is the tutorial for my triangle top-- it's made out of three triangles cut from 2 tees (preferably in contrasting colors). the third strap that wraps around the neck similar to a halter is optional, i just like it there :D
i got the idea for this from a project in generation tee, but this is my spin on it. this is my first how-to, so if i explained it badly just ask questions and ill try to do a better job...
take your first tee, and cut off the bottom hem-- this will be used later for making the straps. next, cut a straight line from the bottom corner to the bottom of the armhole (along the red line). repeat all of this step on your second t-shirt.
NOTE: make sure to leave the folded edge on the right side of the tee intact-- otherwise the triangle will be too small.
cut a third triangle from one of the two shirts...cut a line across the chest part of the shirt reaching from the bottom of one armhole to the other. take this new triangle, and place it right side down on the edge of another triangle in the back, and sew along the green line. repeat with the edge on the other side of the back piece, and you should now have what looks sort of like a tube top.
NOTE: this step is optional, i just think it looks cool...
use the hem from the second shirt and place it between the chest parts, and sew along the green lines, making sure that the part between them is taught, and the other part is longer and hangs down. when you put on the shirt, you fold one side of the loop over the other, and stick your head through so it crosses over on your chest sort of like a halter would.