Answer:
Hey there!
-6 ft is 6 ft below sea level.
Hope this helps :)
In a parallelogram, opposite angles are congruent.
This means that the four angles of the parallelogram are:

Moreover, the sum of the interior angles of a polygon with n sides is 180(n-2). So, the sum of the interior angles of a parallelogram is 360.
This means

And since
, we have 
Answer:
final displacement = - 3cm +5cm = + 2 cm
ie 2 cm towards right