Katana VentraIP

Circumference

In geometry, the circumference (from Latin circumferens, meaning "carrying around") is the perimeter of a circle or ellipse.[1] The circumference is the arc length of the circle, as if it were opened up and straightened out to a line segment.[2] More generally, the perimeter is the curve length around any closed figure. Circumference may also refer to the circle itself, that is, the locus corresponding to the edge of a disk. The circumference of a sphere is the circumference, or length, of any one of its great circles.

For the circumference of a graph, see Circumference (graph theory).

 – Distance along a curve

Arc length

 – Size of a two-dimensional surface

Area

 – Geometric figure which circumscribes a circle

Circumgon

 – Geometric inequality which sets a lower bound on the surface area of a set given its volume

Isoperimetric inequality

List of formulas in elementary geometry

Numericana - Circumference of an ellipse