What term describes the distance around the outside of a figure?

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Multiple Choice

What term describes the distance around the outside of a figure?

Explanation:
Describing the distance around the outside of a figure means measuring the boundary length. That length is called the perimeter. For shapes made of straight sides, you find it by adding up all the side lengths along the edge. For circles, the analogous idea is the circumference—the distance around a curved boundary—which serves the same idea for curved shapes. This is different from area, which is the amount of space inside the boundary, or from radius, which is a line from the center to the edge, and from volume, which measures how much space a 3D object occupies. So the term that describes the distance around the outside is perimeter.

Describing the distance around the outside of a figure means measuring the boundary length. That length is called the perimeter. For shapes made of straight sides, you find it by adding up all the side lengths along the edge. For circles, the analogous idea is the circumference—the distance around a curved boundary—which serves the same idea for curved shapes. This is different from area, which is the amount of space inside the boundary, or from radius, which is a line from the center to the edge, and from volume, which measures how much space a 3D object occupies. So the term that describes the distance around the outside is perimeter.

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