Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A polygon with 12 sides and 12 angles.
from The Century Dictionary.
- noun A polygon having twelve sides and twelve angles.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Geom.) A figure or polygon bounded by twelve sides and containing twelve angles.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geometry a
polygon withtwelve edges and twelveangles
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a twelve-sided polygon
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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He gives the first a wrong date: he assures the world that there is no question about Scaliger's quadrature being wrong, in the eyes of geometers at least: and he states that Clavius mortified him {112} extremely by showing that it made the circle less than its inscribed dodecagon, which is, of course, equivalent to asserting that a straight line is not always the shortest distance between two points.
A Budget of Paradoxes, Volume I (of II) Augustus De Morgan 1838
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The grid units and pixel primitives are of course different in the dodecagon scheme, but the code is otherwise almost identical to that used in the Demonstration and no additional steps are necessary.
Wolfram Blog : Secret Codes in The Wolfram Demonstrations Project (But No Dinosaurs) 2008
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For an image x pixels wide and y pixels tall, there will be xy dodecagons and 2 (x – 1) (y – 1) triangles; the ratio of triangle area to dodecagon area for an a x a image reduces to
Wolfram Blog : Secret Codes in The Wolfram Demonstrations Project (But No Dinosaurs) 2008
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Among the other notable churches of Orvieto are San Giovenale, which contains remnants of ancient frescoes, and San Andrea, which has a dodecagon tower; in 1220 Pierre d'Artois was consecrated King of Jerusalem by
The Catholic Encyclopedia, Volume 11: New Mexico-Philip 1840-1916 1913
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You are acquainted, of course, with the modern rule of giving the bastions a salient angle of fifteen degrees in excess of half the angle of the figure in all figures from the square up to the dodecagon?
Fort Amity Arthur Thomas Quiller-Couch 1903
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He says in so many words that the periphery of the dodecagon is greater than that of the circle; and that the more sides there are to the inscribed figure, the more does it exceed the circle in which it is.
A Budget of Paradoxes, Volume I (of II) Augustus De Morgan 1838
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You may do this: you may put the word _hexagon_ or _dodecagon_, or any other word describing a polygon in the place of _Circle_ in your proof, and the proof would be just as good as before.
A Budget of Paradoxes, Volume II (of II) Augustus De Morgan 1838
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A dodecagon, as most nearly approaching the circle.
The Notebooks of Leonardo Da Vinci — Complete 1452-1519 Leonardo da Vinci 1485
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A dodecagon, as most nearly approaching the circle.
The Notebooks of Leonardo Da Vinci — Volume 2 1452-1519 Leonardo da Vinci 1485
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They fometimes formed either the half of an odtogon, or the half of a dodecagon.
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