Triangles get used to know things about stuff that absolutely is not a triangle.
Like vector addition
Trig is easy as pi. They just try to confuse you by not explaining the different between pi and radians and by forcing memorization instead of true comprehension of concepts. Oh and the whole negative angle thing, which is retarded.
Also, if I want to be in the next beta, I need to pre-order BEFORE beta 2 begins, which is sometime in March. There is no way I'll remember to do that lol.