Circumference
/sərˈkʌmfərəns/noun
The distance around the edge of a circle or any curved shape.
The radius of the circle is half the length of the circumference.
Often appears as...
- circumference of a circle
- calculate the circumference
Usage tips
Technical
Definition 1 of 2
Pro Tip 1/3Mathematical Context
Circumference is often used in geometry and involves calculations.
To find the circle's area, you first need its circumference.
Pro Tip 2/3Measurements Involved
When discussing circumference, expect to use units of length like meters or inches.
What's the circumference of this field in meters?
Pro Tip 3/3Circle Specifics
Circumference is specific to round shapes; don't use it for squares or rectangles.
The circumference, not the width, dictates how much fence we need.
Compare with
borderboundarycontouredgemarginoutlineperimeterrim
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