I have been spending 2 hrs on this vector problems i don't get it?

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Homework Statement


A spelunker is surveying a cave. He follows a passage that goes 210m straight west, then 180 m in a direction 45 degrees east of north, then 110m at 60 degrees east of south. After a 4th unmeasured displacement he finds himself back where he started. Use a scaled drawing to determine the 4th displacement.



Homework Equations





The Attempt at a Solution


I drew the figure but still do not get it! There are 4 different lines so it can't be a triangle. I am certain I have placed both degrees right.
 

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Don't let the problem tell you if there are triangles in there or not. If you can't find any, make some.

Do you know how to solve vector addition problems with components (ie, making some easy right triangles out of vectors)? That's where you'll want to start.