Chapter 7 - Applications of Trigonometry and Vectors - Section 7.4 Vectors, Operations, and the Dot Product - 7.4 Exercises - Page 330: 58

To add the vector $a$ and the vector $b$, we can sketch the vector $a$ and the vector $b$ so that their initial points coincide. When we complete the parallelogram, the resultant vector through the middle of the parallelogram is the vector $a+b$. We can use this method to add vectors. We can see an example in the diagram below.

To add the vector $a$ and the vector $b$, we can sketch the vector $a$ and the vector $b$ so that their initial points coincide. Then we can use another copy of the vector $a$ and the vector $b$ to complete the parallelogram. The resultant vector through the middle of the parallelogram is the vector $a+b$. We can use this method to add vectors. We can see an example in the diagram below.