# CHAPTER 3 — Vector Addition

The previous chapter discussed addition of column matrices.
This is an easy, mechanical procedure.
This chapter shows why it is a *useful* procedure
by discussing
how it represents the *geometrical* operation of
vector addition.

- Addition of geometrical vectors.
- Addition of vectors using the head-to-tail rule.
- Coordinate frames.
- Representing geometrical points with column matrices.
- Representing geometrical vectors with column matrices.
- Addition of vectors using column matrices.
- Vector plus point addition.

### QUESTION 1:

Just for practice,
add the following two column matrices:

**a** = ( 3, 2 )^{T}
**b** = (-2, 1 )^{T}