This site is devoted to mathematics and its applications. Created and run by Peter Saveliev.

# Cartesian coordinate system

### From Mathematics Is A Science

Cartesian coordinate system

## 1 dim 1

the number line

point P < - > number x

distance between points x and x' is |x-x'|

## 2 dim 2

the plane

point P < - > pair of numbers (x,y)

Plotting point P represented by coordinates (x,y):

## 3 dim 3

the space

point P < - > triple of numbers (x,y,z)

Sketch a vector:

Distance formula: