Area in mathematics is used to describe the size or measurement of the area occupied by plane graphics. This area is often used to calculate density and surface area, and it is also one of the basic concepts in many scientific and engineering fields.

The area of a plane figure is usually given by the area surrounded by a polygon or a curve formed by its edge. This area is usually described by two coordinate axes, such as rectangular coordinate system or polar coordinate system. The area calculation of some complex figures may require the use of higher-order mathematical tools such as calculus.

Mathematical regions and their concepts are the basis of almost all scientific and engineering disciplines. Area calculation plays a very important role in materials research, architectural design, electronic engineering and statistics. In addition, there are many applications closely related to life in this field, such as real estate, logistics, agriculture, forestry and environmental science.