What are the four quadrants?

The first quadrant (positive, positive)

Second (negative, positive)

The third (negative, negative)

Fourth (positive and negative)

The part enclosed by the positive direction of the X axis and the positive direction of the Y axis is called the first quadrant, and the counterclockwise direction is the second quadrant, the third quadrant and the fourth quadrant respectively. The x and y coordinates of the first quadrant are positive.

The second quadrant X is negative, Y is positive, the third quadrant X and Y are negative, and the fourth quadrant X is positive and Y is negative.

1, the abscissa (x) of the first quadrant point is greater than 0, and the ordinate (y) is greater than 0.

2. The abscissa (x) of the point in the second quadrant is less than 0, and the ordinate (y) is greater than 0.

3. The abscissa (x) of the point in the third quadrant is less than 0, and the ordinate (y) is less than 0.

4. The abscissa (x) of the point in the fourth quadrant is greater than 0, and the ordinate (y) is less than 0.

Plane rectangular coordinate system divides the plane into four parts, and each part is called quadrant.

If the geometric figure is regarded as the trajectory of a moving point, it can be regarded as composed of points with certain * * * characteristics.

For example, we can think of a circle as the locus of a point with equal distance from a driven point to a fixed point. If we regard points as the basic elements of geometric figures and numbers as the solutions of equations, algebra and geometry will be integrated.