In the Cartesian coordinate system, the four quadrants are defined as follows:
Quadrant I - (top right): Angles between 0◦ and 90◦
Quadrant II - (top left): Angles between 90◦ and 180◦
Quadrant III - (bottom left): Angles between 180◦ and 270◦
Quadrant IV - (bottom right): Angles between 270◦ and 360◦