annulus
Sign in to saveAlso known as ring, annular
geometric surface defined by two concentric circles
In the Vinony graph
Within Vinony's link graph, annulus is referenced by 332 other articles, and connects out to Möbius strip, mathematics and Latin.
It is catalogued under topics including Circles, Elementary geometry and Geometric shapes.
Its subject is documented across 36 Wikipedia language editions.
Wikidata facts
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- Annulus area.svg
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- Commons category
- Annuli
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Encyclopedic overview
An annulus Illustration of Mamikon's visual calculus method showing that the areas of two annuli with the same chord length are the same regardless of inner and outer radii.
In mathematics, an annulus (pl.: annuli or annuluses) is the region between two concentric circles. Informally, it is shaped like a ring or a hardware washer. The word "annulus" is borrowed from the Latin word anulus or annulus meaning 'little ring'. The adjectival form is annular (as in annular eclipse).
Excerpted from Wikipedia’s “annulus” article, available under the CC BY-SA 4.0 licence.