# Definition:Circumference of Geometric Figure

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## Definition

The **circumference** of a geometric figure is the line that forms its boundary.

## Also defined as

The term **circumference** is also used to refer to the length of this line.

Technically, the correct term for the length of the **circumference** of a geometric figure is **perimeter**.

## Sources

- 1989: Ephraim J. Borowski and Jonathan M. Borwein:
*Dictionary of Mathematics*... (previous) ... (next): Entry:**circumference**:**1.**