1. The problem statement, all variables and given/known data A car travels 8 km E, then 8 km N, thrn 16 km W. What is the car's displacement? 2. Relevant equations a^2+b^2=c^2 3. The attempt at a solution R^2=8 ^2+8^2 R=11.3 km. The resultant, R, seems to be 11.3, but I don't think this is the final answer, because I haven't take the 16 km into account yet. What's the next step? Thanks in advance for a reply!