It is because angles are measured counter-clockwise for the horizontal x-axis.
Counter clockwise.
In a Cartesian coordinate system, the plane is divided into four quadrants. The first quadrant (Quadrant I) is where both x and y coordinates are positive, the second quadrant (Quadrant II) has negative x and positive y values, the third quadrant (Quadrant III) has both coordinates negative, and the fourth quadrant (Quadrant IV) features positive x and negative y values. Quadrants are typically numbered counterclockwise, starting from the upper right.
Remember that it goes counterclockwise in a C shape, starting with the first quadrant.
Quadrants I and III, numbered from I at upper right (+, +) left and moving clockwise. The line passes through the origin (0,0).
Quadrant.......... X ...........Y .......I ............positive..positive ......II............negative positive .....III............negative negative ......IV............positive...negative ---------------|--------------- ------Q2------|-------Q1----- ---------------|--------------- ---------------|--------------- ========|========= ---------------|--------------- ---------------|--------------- ------Q3------|------Q4------ ---------------|---------------
Quadrants are usually numbered, using roman numerals, I through IV starting at the top right and going counter-clockwise.
One of the four sections of a graph divided by the x and y axis is called a quadrant. There are four quadrants in total, numbered I, II, III, and IV, starting in the top-right and moving counter-clockwise.
They are called "quadrants".
only in quadrants 2 and 3
In mathematics, the Cartesian coordinate system is divided into four quadrants. These quadrants are labeled as follows: Quadrant I (top right) where both x and y are positive, Quadrant II (top left) where x is negative and y is positive, Quadrant III (bottom left) where both x and y are negative, and Quadrant IV (bottom right) where x is positive and y is negative. The labeling typically starts from Quadrant I and moves counterclockwise.
The axes create the quadrants.
The Cartesian plane is divided into 4 quadrants