1. The problem statement, all variables and given/known data 2. Relevant equations: d = sqrt of dx^2 + dy^2 + dz^2 3. The attempt at a solution: Q1: The second image is the solution diagram. What I don't understand is that why is the force acting from A towards B? Shouldn't it be from B towards A? I'm thinking of it as A as the anchor point which is providing the tension in the cables. Q2: In the second image where the length of AB is determined, how are the values for that got? I understand the 80m and the 30m but why is it a -40? The formula that we use is d = sqrt of dx^2 + dy^2 + dz^2. Where the x, y and z are subscripts. Thanks.