1. The problem statement, all variables and given/known data I think this must be really easy but im not getting a visual for this triangle description. Let ABC be a triangle with [itex]\UparrowOA[/itex]=a and [itex]/UparrowOB[/itex]=b and [itex]/UparrowOC[/itex] = c Where O is the origin . 2. Relevant equations 3. The attempt at a solution How can I have a triangle ABC where all A,B,C are sides coming from O The way i'm looking at this is I have a point O, where the lines A,B,C start from ie, A,B,C only have one available endpoint. So how can these lines make a triangle without introducing a new line?? Clearly, I am imagining things wrong here, I tried drawing it but it still didn't work. Help!!