coordinates determined by their distance d (or radius r), from the origin of a Cartesian plane and their angle θ relative to the reference axis.

a two-dimensional coordinate system in which each point on a plane is determined by its distance r

   a coordinate system of ordered pairs in which the first number of the pair represents distance from the origin, and the second number of the pair represents the angle of inclination from the horizontal axis. polygon:

Many geometric shapes, such as circles, spirals and polygons are easier to describe in polar coordinates, with an angle and radius instead of x,y. You have a central point and you measure the angle in [..]

See coordinates

An alternative system of marking a point on a plane by its radial distance (r) from an "origin" and a polar angle (f). Polar coordinates in 3-dimensional space use (r) and two polar angles ( [..]

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.