ABSTRACT
Today, all physical quantities are classified into two different quantities. The physical quantities can be measured directly or indirectly. Some physical quantities are independent of each other or dependent. A quantity that has its value or a magnitude but no direction then it is called scalar quantity or scalar. Whereas a quantity that has magnitude, as well as direction, is known as vector quantity or vector. This chapter explains the concept of the direction of a vector. The direction of a vector in the direction from its initial point to its terminal point. Two vectors can be of the same direction, opposite direction, or different directions. Collinear vectors can be represented by parallel lines or line segments of the same line. Any number of vectors, which are parallel to the same plane, are called coplanar vectors.
