请问封闭图形什么的长度叫做什么？封闭图形的长度叫做该图形的周长「解析」

最近有很多热心网友都十分关心请问封闭图形什么的长度叫做什么？封闭图形的长度叫做该图形的周长「解析」这个问题。还有一部分人想了解封闭图形什么的长度叫做什么。对此，绿润百科小编「木已凉兮」收集了相关的教程，希望能给你带来帮助。

封闭图形一周的长度，叫做该图形的周长。

周长：封闭图形一周的长度叫做周长，图形一周的长度。周长的长度因此亦相等于图形所有边的和，一般用字母C来表示。

如果以同一面积的三角形而言，以等边三角形的周界最短。如果以同一面积的四边形而言，以正方形的周界是最短。如果以同一面积的五边形而言，以正五边形的周界最短。如果以同一面积的任意多边形而言，以正圆形的周界最短。周长只能用于二维图形（平面、曲面）上，三维图形（立体）如柱体、锥体、球体等都不能以周界表示其边界大小，而是要用总表面面积。䷨

【英文介绍/For English】：

The length of a circle of a closed figure is called the perimeter of the figure.

Circumference: The length of a circle of a closed figure is called the circumference, and the length of a circle of a figure. The length of the perimeter is therefore also equal to the sum of all sides of the figure, generally denoted by the letter C.

In terms of triangles with the same area, the perimeter of an equilateral triangle is the shortest. In terms of quadrilaterals with the same area, the perimeter of a square is the shortest. In terms of pentagons with the same area, the perimeter of a regular pentagon is the shortest. In terms of any polygon with the same area, the perimeter of a perfect circle is the shortest. Perimeter can only be used on two-dimensional graphics (planes, curved surfaces). Three-dimensional graphics (stereotypes) such as cylinders, cones, and spheres cannot use the perimeter to represent their boundary size, but use the total surface area.