These four sections are called quadrants. Quadrants are named using the Roman numerals I, II, III, and IV beginning with the top right quadrant and moving counter clockwise. Ordered pairs within any particular quadrant share certain characteristics. Look at each quadrant in the graph below.
A quadrant is defined as a region in space that is divided into four equal parts by two axes, namely the X-axis and the Y-axis in the Cartesian Plane. These two axes intersect each other at 90°, and the four regions so formed are called the four quadrants, namely the I-quadrant, II-quadrant, III-quadrant, and IV-quadrant.
The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes. The axes themselves are, in general, not part of the respective quadrants.
In the cartesian system, the coordinate plane is divided into four equal parts by the intersection of the x-axis (the horizontal number line) and the y-axis (the vertical number line). These four regions are called quadrants because they each represent one-quarter of the whole coordinate plane.
In geometry, a quadrant is one of the four sections of a rectangular coordinate plane. The four quadrants make up the area contained by the x- and y-axes and are labeled I through IV, starting in the upper right quadrant and going counterclockwise, as shown in the figure below.
The four quadrants are the top right quadrant, the top left quadrant, the bottom left quadrant, and the bottom right quadrant. These quadrants are defined by their relationship to the origin, which is the point where the two axes intersect.