1. The problem statement, all variables and given/known data Use only incidence axioms to prove that every line is contained by at least two planes. 2. Relevant equations 3. The attempt at a solution 1. Let l be any line (Given) 2. l has at least two points A and B such that l=AB (I-5(4) Each line has at least two points) 3. Space has at least 3 noncollinear points, that is A,B, and C (I-5(2) Space has at least three noncollinear points) 4. There exists lines AC and BC (I-1 Each two points determines a line) From here I do not know where to go or even if I am on the right track.