<P> The axes of a two - dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half - axes . </P> <P> These are often numbered from 1st to 4th and denoted by Roman numerals: I (where the signs of the (x, y) coordinates are (+, +)), II (−, +), III (−, −), and IV (+, −). When the axes are drawn according to the mathematical custom, the numbering goes counter-clockwise starting from the upper right ("northeast") quadrant . </P>

What is the meaning of quadrant in math
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