Pappus's hexagon theorem
type: Thing
alternate name: pappian planes
description: theorem that, if the vertices of a hexagon lie alternately on two lines, then the three pairs of opposite sides meet in three collinear points
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citations:
  source: Freebase Data Dumps
  stated in qid: Q15241312
  pub year: 2013
meta:
  wikidata id: Q851166
  domain: theorem
  level: standard
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  data source: Wikidata (CC0 / public domain)
  license: https://creativecommons.org/publicdomain/zero/1.0/
  api version: v1
  served at: 2026-08-24T03:19:25.337514Z
  entity updated at: 2026-05-03T22:54:58.348740+00:00Z
  entity created at: 2026-04-10T23:28:25.316598+00:00Z