For Physics homework I was asked the following question:

Suppose you first walk 12 m in a direction 20 degrees west of north and then 20 m in a direction 40 degrees south of west. How far are you from your starting point, and what is the compass direction of a line connecting your starting point to your final position?

The answer that I arrived at was "26.61 m 65 degrees south of west" using the component method, but I was marked incorrect, is there another way to do this question or did I make a mistake in the calculation?