Physics vector graphing

Question

i have answered this question before and i apologize for asking again but i got the units wrong, im merely trying to learn from my mistakes and using this for educational purposes :)

1. a teacher does a tug of war game with herself in the middle tied to four ropes, each team pulls her in a different direction. Team one exerts 200N north, Team two exerts 50 N to the east, team three exerts 80N to the south, team four exerts 100 N to the west. what is the net force on the teacher (in magnitude and direction)

Answer 1

The net force is the vector sum of the four forces.

You can first add the north and south forces, yielding 120N to the north.

Then you add the east and west forces, yielding 50N to the west.

Therefore the sum of those two forces will then lie in the

north-west quadrant, and can be calculated from the resulting right-angle triangle.

From the Pythagorean theorem the net force is 130N.

By using trigonometry the angle off north is about 22.6 degrees.