Quadrants

A quadrant is each of the four equal parts that the Cartesian axes divide the plane into.

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First Quadrant

The first quadrant is between and 90º.

Sign

Quadrant Abscissa Ordinate
First + +

Examples

The points A = (1, 2), B = (2, 4) C = (3, 5) and D = (5, 1) are in the first quadrant.


Second Quadrant

The second quadrant is between 90º and 180º.

Sign

Quadrant Abscissa Ordinate
Second +

Examples

The points A = (−1, 2), B = (−2, 4) C = (−3, 5) and D = (−5, 1) are in the second quadrant.


Third Quadrant

The third quadrant is between 180º and 270º.

Sign

Quadrant Abscissa Ordinate
Third

Examples

The points A = (−1, −2), B = (−2, −4) C = (−3, −5) and D = (−5, −1) are in the third quadrant.


Fourth Quadrant

The fourth quadrant is between 270º and 360º.

Sign

Quadrant Abscissa Ordinate
Fourth +

Examples

The points A = (1, −2), B = (2, −4) C = (3, −5) and D = (5, −1) are in the fourth quadrant.





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