What are coplanar vectors ?

Explanation

### Step-by-Step Solution:

1. **Definition of Coplanar Vectors**:
- Coplanar vectors are defined as vectors that lie in the same geometric plane. This means that if you can draw a flat surface (plane) such that all the vectors can be represented on this surface, then those vectors are coplanar.

2. **Two Vectors**:
- Any two vectors are always coplanar. Regardless of their direction or magnitude, you can always find a plane that contains both vectors. For example, if you have vector A and vector B, you can visualize a plane that passes through both vectors.

...