How Do You Calculate Displacement in Vector Kinematics?

[Tiplerfan]

Homework Statement

In a total time of 2.0 min, a duck on a pond paddles 22m [36deg N of E] and then paddles another 65 m [E 25deg S].

Determine the duck's

i) total distance...I answered this.
ii) average speed...I answered this.
iii) total displacement...This is my dilema.
iv) average velocity...I can aswer this one once I know the displacement.

Homework Equations

I'm really not sure how to go about finding the displacement when angles are involved. Do I use trig or one of the formula's?

The Attempt at a Solution

Using trig on the vector diagram I came up with a displacement of 34m [E 25deg S].

 

[esalihm]

split the two displacements into componenets (N,W,S,E)
then sum them up (but don't forget to subtract when necessary)
I mean use vector sum :)