The circumference is in English, so it is generally represented by the letter C.

The length integral of the edge around a finite area is called the perimeter, which is the length of a graph.

Calculation formula of perimeter:

1, the perimeter of the rectangle = (length+width) × 2;

2, the perimeter of the square = side length × 4;

3. The circumference of a circle = π× diameter? = ? 2× pi× radius.

Extended data

Representation of other symbols in mathematics;

1, s: area;

3.v: volume;

3.h: high;

4.d: diameter;

5.r: radius;

6.⊥: vertical;

7.∨: * * * line vector;

8.∞: Angle and inclination;

9.⌒: arc;

10, ∝: proportional;

1 1, ≦: not equal to;

12, ≤: less than or equal to;

13, ≥: greater than or equal to;

14, ∞: infinity.

reference data

Baidu encyclopedia-periphery