Magnitude of a vector  Vectors
Magnitude of a vector
Finding the magnitude of a vector is very much the same as determining the length of the hypotenuse of a right triangle – we almost use the exact Pythagorean formula! In this section, we will learn how the horizontal component and the vertical component enable us to algebraically calculate the magnitude of a vector.
Basic concepts:
 Pythagorean theorem
 Horizontal and vertical distances
Related concepts:
 Distance and midpoint of complex numbers
Lessons
Notes:
Magnitude of a vector $ \vec{v}=\sqrt{v^2_x+v^2_y}$

1.
Find the magnitude of the following vectors:

2.
Find the magnitude of the following vectors:

3.
Find the magnitude of the following vectors: