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quadrant
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In rectangular Cartesian coordinates, the first quadrant is defined as the area to the right of the y-axis and above the x-axis, in which both x and y are positive. The second quadrant is the section to the left of the y-axis and above the x-axis, in which x is negative and y is positive. The third quadrant is below the x-axis and to the left of the y-axis, in which both x and y are negative. The fourth quadrant is the division below the x-axis and to the right of the y-axis, in which x is positive and y is negative.
In polar coordinates, the first, second, third, and fourth quadrants are defined as the sections from 0° to 90°, 90° to 180°, 180° to 270°, and 270° to 360°, respectively.
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