van Aubel's theorem

theorem that, given a convex quadrilateral, if one constructs a square—external to the quadrilateral—on each side, the 2 line segments between the centers of opposite squares have equal lengths and are orthogonal
Intangible theorem Q594571
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van Aubel's theorem

Summary

van Aubel's theorem is a theorem[1]. It draws 25 Wikipedia views per month (theorem category, ranking #256 of 1,306).[2]

Key Facts

  • van Aubel's theorem's image is recorded as Van-Aubel-theorem combined.svg[3].
  • van Aubel's theorem's instance of is recorded as theorem[4].
  • van Aubel's theorem's part of is recorded as list of theorems[5].
  • van Aubel's theorem's Commons category is recorded as Van Aubel's theorem[6].
  • van Aubel's theorem's time of discovery or invention is recorded as +1878-00-00T00:00:00Z[7].
  • van Aubel's theorem's Freebase ID is recorded as /m/08l1_9[8].
  • van Aubel's theorem's statement describes is recorded as quadrilateral[9].
  • van Aubel's theorem's MathWorld ID is recorded as vanAubelsTheorem[10].
  • van Aubel's theorem's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • van Aubel's theorem's Microsoft Academic ID is recorded as 2776852669[12].

Why It Matters

van Aubel's theorem draws 25 Wikipedia views per month (theorem category, ranking #256 of 1,306).[2] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[13]

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . Freebase Data Dumps. wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] . Wikidata sitelinks. 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). van Aubel's theorem. Retrieved May 3, 2026, from https://4ort.xyz/entity/van-aubel-s-theorem
MLA “van Aubel's theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/van-aubel-s-theorem.
BibTeX @misc{4ortxyz_van-aubel-s-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{van Aubel's theorem}}, year = {2026}, url = {https://4ort.xyz/entity/van-aubel-s-theorem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): van Aubel's theorem — https://4ort.xyz/entity/van-aubel-s-theorem (retrieved 2026-05-03)

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