###### A coordinate system is a way of defining the location of a point on a map, in two or three dimensions. There are several types of coordinate systems, but the most common are Cartesian (or rectangular), polar, and spherical.

**Cartesian Coordinate System**: In this system, the position of a point is defined by two or three numbers that represent the distances from a set of perpendicular axes. In a two-dimensional Cartesian coordinate system, the axes are usually labeled X and Y. In a three-dimensional system, a third axis, Z, is added. Points in the Cartesian system are represented as (x, y) or (x, y, z) depending on the number of dimensions.**Polar Coordinate System**: In a polar coordinate system, the position of a point is defined by two numbers: the radial distance from the origin and the angle that the line connecting the origin and the point makes with the positive X-axis. Points in the polar system are represented as (r, Î¸).**Spherical Coordinate System**: In this system, the position of a point is defined by three numbers: the radial distance from the origin, the polar angle (the angle from the positive Z-axis), and the azimuthal angle (the angle from the positive X-axis in the XY-plane). Points in the spherical system are represented as (r, Î¸, Ï†).

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