Perimeter vs. Circumference - What's the difference?

Main Difference

The main difference between Perimeter and Circumference is that the Perimeter is a path that surrounds an area and Circumference is a linear distance around the outside of a closed curve or circular object.

Wikipedia

  • Perimeter

    A perimeter is a path that surrounds a two-dimensional shape. 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 circle or ellipse is called its circumference. Calculating the perimeter has several practical applications. A calculated perimeter is the length of fence required to surround a yard or garden. The perimeter of a wheel (its circumference) describes how far it will roll in one revolution. Similarly, the amount of string wound around a spool is related to the spool's perimeter.

  • Circumference

    In geometry, the circumference (from Latin circumferentia, meaning "carrying around") of a circle is the (linear) distance around it. That is, the circumference would be the length of the circle if it were opened up and straightened out to a line segment. Since a circle is the edge (boundary) of a disk, circumference is a special case of perimeter. The perimeter is the length around any closed figure and is the term used for most figures excepting the circle and some circular-like figures such as ellipses. Informally, "circumference" may also refer to the edge itself rather than to the length of the edge.

Wiktionary

  • Perimeter (noun)

    The sum of the distance of all the lengths of the sides of an object.

  • Perimeter (noun)

    The length of such a boundary.

  • Perimeter (noun)

    The outer limits of an area. circumference

  • Perimeter (noun)

    A fortified strip or boundary usually protecting a military position.

  • Perimeter (noun)

    An instrument for determining the extent and shape of the field of vision.

  • Circumference (noun)

    The line that bounds a circle or other two-dimensional figure

  • Circumference (noun)

    The length of such a line

  • Circumference (noun)

    The surface of a round or spherical object

  • Circumference (noun)

    The length of the longest cycle of a graph

  • Circumference (verb)

    To include in a circular space; to bound.

Oxford Dictionary

  • Perimeter (noun)

    the continuous line forming the boundary of a closed geometrical figure

    "the perimeter of a rectangle"

  • Perimeter (noun)

    the outermost parts or boundary of an area or object

    "a perimeter fence"

    "the perimeter of the garden"

  • Perimeter (noun)

    an area away from the basket, beyond the reach of the defensive team

    "he was very patient in working the ball around the perimeter"

  • Perimeter (noun)

    an instrument for measuring the extent and characteristics of a person's field of vision.

  • Circumference (noun)

    the enclosing boundary of a curved geometric figure, especially a circle.

  • Circumference (noun)

    the distance around something

    "babies who have small head circumferences"

    "a rope two inches in circumference"

Webster Dictionary

  • Perimeter (noun)

    The outer boundary of a body or figure, or the sum of all the sides.

  • Perimeter (noun)

    An instrument for determining the extent and shape of the field of vision.

  • Circumference (noun)

    The line that goes round or encompasses a circular figure; a periphery.

  • Circumference (noun)

    A circle; anything circular.

  • Circumference (noun)

    The external surface of a sphere, or of any orbicular body.

  • Circumference

    To include in a circular space; to bound.

Princeton's WordNet

  • Perimeter (noun)

    the boundary line or the area immediately inside the boundary

  • Perimeter (noun)

    a line enclosing a plane areas

  • Perimeter (noun)

    the size of something as given by the distance around it

  • Circumference (noun)

    the size of something as given by the distance around it

  • Circumference (noun)

    the length of the closed curve of a circle

Illustrations

Perimeter

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