(Note: Trifix not Triad)
Apparently some people are in favor of picking one type from each triad (heart, head, gut) that you've scored highest on or relate to the most instead of having a wing that you share motivations and fears with. For example, A 2 that ocasionally deals with anxiety by distracting themselves, and deals with anger by controlling their surrondings, would be a 2-7-8, and would be different to a different two that deals with anxiety with vigilance, distrust of authority, and anger by being self critical, which would be 2-6-1.
You can even just base these on what you score highest on in the test, though you'd ignore another type that's within your triad of course (that is, there's no 8-9-1 type :P).
Some people even try to work out the wings of these that they relate to most... like you'd have a 2w3-7w6-8w9. Though I would have thought it'd be a better idea to just say that you just don't relate to the remaining three enneagram types...
Many people have stated that you need to have a lot of awareness of yourself and a solid understanding of the enneagram before you can work out your tritype/trifix with any kind of certainty. So using your test scores is probably not the most accurate way to work it out for good (it's a nice place to start though I think).
I'd probably type myself as a 7-9-3, based on my test scores and which types I somewhat relate too. Has anyone who's already done this found it useful at all?