From home George jogs 3.5km NE and then 8.2km SE. Find the bearing of his final position from the starting position.

The problem about all bearing questions is that i don't know how to find the conventional like sometimes u have to subtract 360 degrees and then add on 270. Its CONFUSINGG(Crying) Please helpp

And a diagram would be reallly goood please a diagram would help. Thanks a lot