Which of the following statements describes the concept of perimeter?

The concept of perimeter refers specifically to the total distance around the edge of a two-dimensional shape. It is calculated by adding together the lengths of all the sides of the shape. For instance, in a rectangle, perimeter is obtained by adding up the lengths of all four sides, or alternatively, by using the formula ( P = 2 \times (length + width) ).

In contrast, the other options describe different geometric concepts. The area (A) pertains to the space contained within a shape, height (C) refers to the measurement of an object from base to top, and volume (D) concerns the amount of three-dimensional space an object occupies. Consequently, the definition of perimeter is specifically aligned with the idea of measuring the boundary or outline of a shape, making it the correct choice.