Perimeter vs. Periphery — What's the Difference?

A perimeter is either a path that encompasses/surrounds/outlines a shape (in two dimensions) or its length (one-dimensional). The perimeter of a circle or an ellipse is called its circumference.

A line that forms the boundary of an area; a perimeter.

The continuous line forming the boundary of a closed geometrical figure

The outside surface of an object.

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

The area along a boundary; the margin.

A closed line bounding a plane area.

An area of secondary status or lesser importance

The length of such a line.

The outside boundary, parts or surface of something.

The outer limits of an area.

A first-rank administrative division of Greece, subdivided into provinces.

A defended boundary protecting a military position.

The outside or superficial portions of a body; the surface.

(Basketball) The three-point line.

The circumference of a circle, ellipse, or other figure.

(mathematics) The sum of the distance of all the lengths of the sides of an object.

The outside boundary or surface of something

(mathematics) The length of such a boundary.

The outer limits of an area. circumference

A fortified strip or boundary usually protecting a military position.

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

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

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

The boundary line or the area immediately inside the boundary

A line enclosing a plane areas

The size of something as given by the distance around it