What term describes the distance measured around the outline of a rectangle?

The term that describes the distance measured around the outline of a rectangle is perimeter. Perimeter is a geometric measurement that calculates the total length of all the sides of a two-dimensional shape. In the case of a rectangle, it can be calculated by adding together the lengths of all four sides, or more efficiently using the formula 2(length + width).

Understanding perimeter is fundamental in various applications, such as fencing a yard or framing a picture, where knowing the total distance around an object is crucial. The other terms provided relate to different measurements: area measures the space within a shape, volume measures the space occupied by a three-dimensional object, and radius pertains to the distance from the center of a circle to its edge. Therefore, perimeter is the accurate term for this particular measurement.