# Distance Formula

These formulae are use to calculate distance between two points in Cartesian Coordinate System.

## Distance Formula in 2D

For any two given points $$(x_1,y_1)$$ and $$(x_2,y_2)$$ in 2D the distance d is calculated as:

$$d=\sqrt {(x_2 - x_1)^2 + (y_2 - y_1)^2 }$$

## Distance Formula in 3D

For any two given points $$(x_1,y_1,z_1)$$ and $$(x_2,y_2,z_2)$$ in 3D the distance d is calculated as:

$$d=\sqrt {(x_2 - x_1)^2 + (y_2 - y_1)^2 + (z_2 - z_1)^2 }$$