Hands-on math!


A quadrant is one of the 4 parts of a cartesian coordinate grid. The grid is made by crossing two number lines that intersect at zero (0,0) (the origin) to make a plane. The horizontal axis is the X axis and the vertical axis is the Y axis. They are numbered with roman numerals to denote the 4 parts of the grid like this:

Quadrant II:
X is negative
and Y is positive
==> <==
Quadrant I:
Both X and Y are positive
Quadrant III:
X and Y
are both negative
==> <== Quadrant IV:
X is positive and
Y is negative

For an explanation of cartesian coordinates and quadrants see the notes on cartesian coordinates.