1. The problem statement, all variables and given/known data If A-B-C (vectors) and A^2+ B^2+ c^2 where X is the magnitude of X(vector) for X-A,B,C, then the vectors A and B are perpendicular to each other. (True or false?) 2. Relevant equations 3. The attempt at a solution Honestly, I never post anything unless I have it at least halfway solved. But I'm completely confused by this question. Can anyone help me?