# AQA A Level Maths: Pure复习笔记11.1.4 Position Vectors

### Position Vectors

#### What is a position vector?

• Position vectors describe the position of a point in relation to the origin
• They are different to direction vectors which describe the direction and distance between any two points

#### Distance between two points

• The distance between two points is the magnitude of the vector between them (see Magnitude Direction)

• For position vectors we can find the distance between two points by using the respective co-ordinates

#### Exam Tip

• Remember if asked for a position vector, you must find the vector all the way from the origin.
• Diagrams can help, if there isn’t one, draw one.