Square centimeter is a common unit for mathematical calculation and area. The symbol is c㎡ English: Square centimeter is the metric unit of area (SI? Unit), defined as "the area of a square with a side length of 1 cm". About the size of a thumb nail.

Commonly used units can be divided into 17 categories, such as the quality and length of leather beams. Each category contains many units, and the units in each category can be converted to each other through a certain proportion. The size of the sun area of the plane figure occupied by objects is called their area. Area is the size of a plane figure.

Area unit refers to the unit for measuring the surface size of an object. The order from small to large is: mm? (square millimeters), centimeters? (square centimeter), dm? (square decimeter), m? (square meters), huh? (hectares), kilometers? (square kilometers). In the International System of Units (SI), the standard unit area is square meters (m2), and the area is a square area one meter long.

The lateral product of plane grip is a quantity representing the degree of plane surface in a two-dimensional figure or shape or plane. A surface region is a simulation on a two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness, which is necessary to form a shape model. The area of a shape can be measured by comparing a fixed size shape with a square.