Ok, I tried it, and managed to make a triangle.
somehow I was loosing a stitch every row. I started with 12 for the foundation chain. Then I somehow decreased.
I put the hook into the back of the stitch, pulled the yarn through, then wrapped the yarn around the hook, and pulled it through the two stitches on the hook. (Was that right?)
Ok, forgive the fuzzy pic. I took it on my cell, at work, trying to keep people from seeing what I was doing. But you can get a general idea of the shape.
It basically looks like candy corn.