| Title: | Dodecagon |
| Original Title: | Dodecagone |
| Volume and Page: | Vol. 5 (1755), p. 10 |
| Author: | Jean-Baptiste le Rond d'Alembert (biography) |
| Translator: | Akash Chandra |
| Subject terms: |
Geometry
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| Original Version (ARTFL): | Link |
| Rights/Permissions: |
This text is protected by copyright and may be linked to without seeking permission. Please see http://quod.lib.umich.edu/d/did/terms.html for information on reproduction. |
| URL: | http://hdl.handle.net/2027/spo.did2222.0004.084 |
| Citation (MLA): | d'Alembert, Jean-Baptiste le Rond. "Dodecagon." The Encyclopedia of Diderot & d'Alembert Collaborative Translation Project. Translated by Akash Chandra. Ann Arbor: Michigan Publishing, University of Michigan Library, 2021. Web. [fill in today's date in the form 18 Apr. 2009 and remove square brackets]. <http://hdl.handle.net/2027/spo.did2222.0004.084>. Trans. of "Dodecagone," Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers, vol. 5. Paris, 1755. |
| Citation (Chicago): | d'Alembert, Jean-Baptiste le Rond. "Dodecagon." The Encyclopedia of Diderot & d'Alembert Collaborative Translation Project. Translated by Akash Chandra. Ann Arbor: Michigan Publishing, University of Michigan Library, 2021. http://hdl.handle.net/2027/spo.did2222.0004.084 (accessed [fill in today's date in the form April 18, 2009 and remove square brackets]). Originally published as "Dodecagone," Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers, 5:10 (Paris, 1755). |
DODECAGON, a regular polygon that has twelve equal angles and twelve equal sides. See Polygon.
The dodecagon is easily traced when the hexagon is drawn, for we need only to divide each angle into two equal halves at the center of the hexagon, and we see that the side of the hexagon, inscribed in the circle, is equal to the radius. See Hexagon.
A place secured by twelve bastions is called dodecagon in terms of Fortification.