Quadrant
Most commonly used in mathematics to refer to the four quarters of the
coordinate plane.
Recall that the
coordinate plane
has an xaxis that divides into a top and bottom half, and a yaxis dividing into the left and right half. Together they create the four quadrants of the plane.
By convention they are numbered one to four, the first quadrant being to the top right, and then going counterclockwise from there
Also by convention they are often numbered using Roman numerals:
I II III IV.
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