What does the perimeter of a shape measure?

The perimeter of a shape measures the distance around that shape. It is calculated by adding together the lengths of all the sides of the shape, providing a complete boundary measurement. This concept is essential in various applications, such as determining the amount of fencing needed for a yard or the dimensions of a decorative frame.

The other options reflect different geometric measurements: area pertains to the space within the boundaries of a shape, height refers to the vertical dimension of a shape, and volume measures the three-dimensional space enclosed within a solid. Understanding the distinction between perimeter and these other concepts is crucial in geometry and related fields.