# Cylindrical Coordinates

#### emt

Joined Oct 27, 2015
12
Cylindrical Coordinates

* why is there ρ in graph (from where came)?

*what is difference between "ρ0" and "ρ" ?

#### Papabravo

Joined Feb 24, 2006
12,770
ρ is the radial coordinate. ρ0 is a particular constant value of the radial coordinate at which a differential length or differential area is computed.

$$\rho=\sqrt{x^2 + y^2}$$

As shown in the diagram the cylindrical coordinates are ρ, φ, and z

emt