A '''perimeter''' is a [[path]] that [[surrounds]] an area. The word comes from the Greek ''peri'' (around) and meter (measure). The term may be used either for the path or its length - it can be [[thought]] of as the length of the outline of a shape. The perimeter of a [[circular]] area is called its [[circumference]]. | A '''perimeter''' is a [[path]] that [[surrounds]] an area. The word comes from the Greek ''peri'' (around) and meter (measure). The term may be used either for the path or its length - it can be [[thought]] of as the length of the outline of a shape. The perimeter of a [[circular]] area is called its [[circumference]]. |