In a polar coordinate system, the coordinates of an ordered pair (

*r*,*θ*) associated with the position of a point*P*, where*r*is the distance from the origin to point*P*and*θ*is the angle of rotation.The origin

The distance

The angle of rotation

*of the coordinate system is called the***O****pole**.The distance

*from the pole to point***r***P*is called the radius or polar axis.The angle of rotation

**is called the polar angle or azimuth.***θ*