1, grid method: the grid method compares the sizes of two graphs by calculating the grid. The graphic area with more grids is large, and the graphic area with less grids is small. If the grids are the same, the areas of the two graphs are the same.

2. Grouping method: Grouping method is to compare the sizes of two graphs by grouping without calculation.

3. Translation method: Translation method is to compare the areas of two graphs through the translation changes of graphs.

4. Rotation method: You can also compare the sizes of areas between graphs by rotating the graphs.

5. Digging and filling method: The problem of area comparison between different figures can also be solved by more complicated digging and filling operations.

6. Calculation method: The most direct way to compare the areas between graphs is to compare them by calculation. The calculation process should be clear and reasonable, the results should be clear at a glance, and no mistakes should be made.

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The greater the circumference of an object, the greater its area. Area is a quantity indicating the degree of two-dimensional figure or shape or plane layer in a plane, and surface area is the simulation of three-dimensional objects on a two-dimensional surface. Perimeter can only be used on two-dimensional graphics (planes and surfaces), and three-dimensional graphics (solids) such as cylinders, cones and spheres can't express their boundary size with perimeter.

But the total surface area. 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).

In mathematics, the problem of area is studied as follows: firstly, the area of a square with a side length of 1 is defined as 1, which is a self-evident axiom. Then, the so-called unit square is used to measure other plane geometries.

The concept of area was formed very early. In ancient Egypt, the Nile River flooded once a year, which brought fertile silt to both banks, but also erased the boundary marks between fields. When the water recedes, people must measure and calculate the field if they want to redraw the boundaries of the field, so the concept of area gradually came into being.