The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes. The axes themselves are, in general, not part of the respective quadrants. Learn about the concept of Quadrants in Mathematics, their definitions, the four quadrants in coordinate plane, sign convention in quadrants, and trigonometric values in different quadrants. Solve example problems and practice questions. On the cartesian plane when the two axes, X-axis and Y-axis, intersect with each other at 90 º and there are four regions formed around it, and those regions are called quadrants. So, every plane has four quadrants each bounded by half of the axes. We giving the complete details regarding quadrants, its definition, signs of coordinates on each quadrant, and its examples in the following sections. Have a look at them and know about quadrant 1, quadrant 2, quadrant 3, and quadrant 4.