perimeter

Also known as circumference, perimeter length, length of perimeter

thumb|250px|Perimeter is the distance around a two-dimensional [[shape, the length of the shape's boundary.]]

AI overview

Perimeter is the distance around the outside edge of a flat, two-dimensional shape, measured by adding up the lengths of all its sides. It matters because it helps us figure out how much material we'd need to go around something (like fencing for a yard) or understand the size of a shape's boundary.

AI-generated from the Wikipedia summary — may contain errors.

~8 min read

Article

9 sections

Contents

Formulas
Polygons
Circumference of a circle
Perception of perimeter
Isoperimetry
Etymology
See also
References
External links

thumb|250px|Perimeter is the distance around a two-dimensional [[shape, the length of the shape's boundary.]]

A perimeter is the length of a closed boundary that encompasses, surrounds, or outlines either a two-dimensional shape or a one-dimensional line. The perimeter of a circle or an ellipse is called its circumference.