Area of rectangle = length × width.

Area of a square = side length × side length.

Area of triangle = base × height ÷2. Area of parallelogram = base × height. Trapezoidal area = upper bottom, lower bottom × height ÷2. Area of circle = π× radius 2. The lateral area of the cylinder and the lateral area of the cylinder are equal to the perimeter of the bottom multiplied by the height.

The size of the plane figure occupied by objects is called their area.

When the space occupied by an object is a two-dimensional space, the size of the space occupied is called the area of the object, which can be plane or curved. Square meter, square decimeter and square centimeter are recognized units of area, which can be expressed in letters as (m, dm, cm).

brief introduction

Area is a quantity indicating the degree of a two-dimensional figure or shape or plane layer in a 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 model of shape, or the amount of paint required to cover a surface with a single coating. It is a two-dimensional simulation of curve length (one-dimensional concept) or solid volume (three-dimensional concept).

The area of a shape can be measured by comparing a fixed size shape with a square. In the International System of Units (SI), the standard unit area is square meters. A square area with an area of one meter and an area of three square meters will have the same shape as three such squares. In mathematics, the unit square is defined as 1, and the area of any other shape or surface is a dimensionless real number.