annulus

geometric surface defined by two concentric circles
Thing general Q45926
Press Enter · cited answer in seconds

annulus

Summary

annulus ranks in the top 2% of general entities by monthly Wikipedia readership (211 views/month).[1]

Key Facts

  • annulus's image is recorded as Annulus area.svg[2].
  • annulus's subclass of is recorded as shape[3].
  • annulus's Commons category is recorded as Annuli[4].
  • annulus's Freebase ID is recorded as /m/01zx6q[5].
  • annulus's Gran Enciclopèdia Catalana ID is recorded as 0172238[6].
  • annulus's defining formula is recorded as A = \pi (R^2 - r^2) = \pi (R+r)(R-r)[7].
  • annulus's BabelNet ID is recorded as 00003900n[8].
  • annulus's MathWorld ID is recorded as Annulus[9].
  • annulus's nLab ID is recorded as annulus[10].
  • annulus's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • annulus's Microsoft Academic ID is recorded as 57641907[12].
  • annulus's Australian Educational Vocabulary ID is recorded as scot/13621[13].
  • annulus's in defining formula is recorded as A[14].
  • annulus's in defining formula is recorded as R[15].
  • annulus's in defining formula is recorded as r[16].
  • annulus's WordNet 3.1 Synset ID is recorded as 13898031-n[17].
  • annulus's ScienceDirect topic ID is recorded as physics-and-astronomy/annuli[18].
  • annulus's Gran Enciclopèdia Catalana ID is recorded as corona-circular[19].

Why It Matters

annulus ranks in the top 2% of general entities by monthly Wikipedia readership (211 views/month).[1] annulus has Wikipedia articles in 23 language editions, a strong signal of global cultural recognition.[20] annulus is known by 13 alternative names across languages and contexts.[21]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [3] . wikidata.org.
  3. [4] . wikidata.org.
  4. [5] . Freebase Data Dumps. wikidata.org.
  5. [6] . wikidata.org.
  6. [7] . wikidata.org.
  7. [8] . BabelNet. wikidata.org.
  8. [9] . wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . wikidata.org.
  11. [12] . wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . wikidata.org.
  14. [15] . wikidata.org.
  15. [16] . wikidata.org.
  16. [17] . GF WordNet. wikidata.org.
  17. [18] . wikidata.org.
  18. [19] . wikidata.org.

Aggregate / graph-position facts

  1. [1] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [20] . Wikidata sitelinks. wikidata.org.
  3. [21] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). annulus. Retrieved April 10, 2026, from https://4ort.xyz/entity/annulus-q45926
MLA “annulus.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/annulus-q45926.
BibTeX @misc{4ortxyz_annulus-q45926_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{annulus}}, year = {2026}, url = {https://4ort.xyz/entity/annulus-q45926}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): annulus — https://4ort.xyz/entity/annulus-q45926 (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/annulus-q45926 · Last refreshed: