annulus (Q45926)
geometric surface defined by two concentric circles
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Current Data About annulus
(P18) Image Provided By https://upload.wikimedia.org/wikipedia/commons/c/c6/Annulus_area.svg

(P279) (Q207961)

(P373) Annuli

(P2534) A = \pi (R^2 - r^2) = \pi (R+r)(R-r)

(P6104) (Q8487137)

(P7235) A
(P9758)

R
(P9758)

r
(P9758)

other details
aliases ring
 annular
description geometric surface defined by two concentric circles

External Links
(P646) /m/01zx6q
(P1296) 0172238
(P2581) 00003900n
(P2812) Annulus
(P4215) annulus
(P6366) 57641907
(P7033) scot/13621
(P8814) 13898031-n
(P10376) physics-and-astronomy/annuli
(P12385) corona-circular