**1. The problem statement, all variables and given/known data**

Use the componant method to determine the total displacement given by the two vectors shown in each diagram.

**2. Relevant equations**

**3. The attempt at a solution**

I thought I just had to find the third unknown side, and use the pythagorean theorem, but I was getting the wrong answer. My book says 11 km.

Any help is appreciated.

http://ift.tt/1ldqZEy