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Archimedean spiral — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Archimedean_spiral
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-09T19:41:33.751Z
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How to cite

Archimedean spiral — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Archimedean_spiral (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_2fdba024179b (Metraipolis archive dc_2fdba024179b, sha256 f8e02c71c1eb502d4d01ddfa23b23c543776527e554efef1d9dcc179b86f2f6e)

BibTeX

@misc{dc2fdba024179b,
  title = {Archimedean spiral — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Archimedean_spiral},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_2fdba024179b; sha256 f8e02c71c1eb502d4d01ddfa23b23c543776527e554efef1d9dcc179b86f2f6e},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Archimedean_spiral. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The Archimedean spiral (also known as Archimedes' spiral, the arithmetic spiral) is a spiral named after the 3rd-century BC Greek mathematician Archimedes. The term Archimedean spiral is sometimes used to refer to the more general class of spirals of this type (see below), in contrast to Archimedes' spiral (the specific arithmetic spiral of Archimedes). It is the locus corresponding to the locations over time of a point moving away from a fixed point with a constant speed along a line that rotates with constant angular velocity. Equivalently, in polar coordinates (r, θ) it can be described by the equation r=b⋅θ with real number b. Changing the parameter b controls the distance between loops. From the above equation, it can thus be stated: position of the particle from point of start is proportional to angle θ as time elapses. Archimedes described such a spiral in his book On Spirals. Conon of Samos was a friend of his and Pappus states that this spiral was discovered by Conon.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «Archimedean spiral» — https://en.wikipedia.org/wiki/Archimedean_spiral
Wikidata Q28967: «tipo di curva piana» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q28967
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Archimedean_spiral?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1373603399, consultata il 2026-11-09T19:38:20.496Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 3bfb2ac26d6de348024140a0f525add8fbc1f6127b67cc377017c8270aaa467b