I need to prove that every line is contained by at least two planes using only the incidence axioms. This is what I have so far... Conclusions Justifications 1. Let l be any line. Given 2. l has at least two points A and B such that I-5(4) l = AB. 3. Space has at least 3 non-collinear points, I-5(2) that is A,B,C 4. There exists line AC and line BC I-1 Help from here?