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aidb
annulus
Image: Wikimedia Commons

annulus

Geometric surface defined by two concentric circles

EntityQ45926

Also known as ring · annular

Subclass of

Overview

All data

14 statements · 21% with external sources · numbers in brackets are citations

Defining formula
  • A = \pi (R^2 - r^2) = \pi (R+r)(R-r)
In defining formula

On other databases

10 identifiers linking annulus across the web's reference databases