Polar Coordinates

In mathematics, the polar coordinate system is a two-dimensional coordinate system in which each point on a plane is determined by an angle and a distance. The polar coordinate system is especially useful in situations where the relationship between two points is most easily expressed in terms of angles and distance; in the more familiar Cartesian or rectangular coordinate system, such a relationship can only be found through trigonometric formulae.
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1. Coordinates derived from the distance and angular measurements from a fixed point (pole). 2. In artillery and naval fire support, the direction, distance, and vertical correction from the observer/spotter position to the target. 1/9/74

1. Coordonnées faisant appel à la distance et à des références angulaires par rapport à un point fixe (pôle). 2. En artillerie et en appui feu naval, gisement d'observation, distance et corrections en élévation entre la position de l'observateur et celle de l'objectif. 1/9/74

Polar coordinates (r, ) represent the location of a point (in 2D space) by its distance (r) from a fixed point on a fixed line (polar axis) and the angle ( , in radians) from that fixed line.

Polar plots are used to visualize functions. They also offer an intuitive way to present relations involving a variable representing direction.
See also, Cartesian Coordinates .

B: (Kimia) koordinat polar
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