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# Mathematics-Magnitude of a Vector

A Vector has both magnitude and direction. The length of the arrow shows its magnitude and arrowhead shows its direction.

Magnitude of a vector, a is calculated by using the formula | a |, the modulus of a vector a.

If a vector has magnitude 1, then it is called

**unit vector.**

**How to scale a vector ?**

A vector can be scaled by Multiplying the vector with a scalar value.

Eg) Magnitude of a vector, a = |a| = √(5

^{2}+ 4

^{2}) , if vector a =

**5i + 4j**