A variety of mathematical operations can be performed with and upon vectors. One such operation is the addition of vectors. Vector addition is the operation of adding two or more vectors together into a vector sum. The so-called parallelogram law gives the rule for vector addition of two or more vectors.

For two vectors vec u = (2,5) e vec v = (2,-3) the vector sum can be obtained this way: vec w = (2,5) + (2,-3) hArr vec w = (2+2,5-3) hArr vec w = (4, 2).

Created with GeoGebra by Vitor Nunes

### Interactivity

Try to move the end sides of the vectors vec u and vec v and see what happens to the resultant vec w.