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nonagon
nonagon Geom. (ˈnɒnəgən) [irreg. f. L. nōn-us ninth, after hexagon. Cf. OF. nongone.] A figure having nine angles; an enneagon.1688 R. Holme Armoury iii. xvi. (Roxb.) 98/1 An Henneagon, or Enneagon or Nonagon, a fort of nyne corners. a 1696 Scarburgh Euclid (1705) 174 Of the..Nonagon, Euclide makes ...
Oxford English Dictionary
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Nonagon
Regular nonagon
A regular nonagon is represented by Schläfli symbol {9} and has internal angles of 140°. The area of a regular nonagon of side length a is given by
where the radius r of the inscribed circle of the regular nonagon is
and where R is the radius
wikipedia.org
en.wikipedia.org
Nonagon - Definition, Formula, Examples | Nonagon Shape - Cuemath
Nonagon is a polygon that has 9 sides and 9 interior angles and 9 exterior angles. A nonagon has 27 diagonals and the sum of the interior angles of a nonagon is 1260°. A nonagon shape can be regular or irregular depending upon the sides and angles.
www.cuemath.com
Regular Nonagon -- from Wolfram MathWorld
Jan 23, 2024The regular nonagon is the regular polygon with nine sides and Schläfli symbol {9}. The regular nonagon cannot be constructed using the classical Greek rules of geometric construction, but Conway and Guy (1996) give a Neusis construction based on angle trisection. Madachy (1979) illustrates how to construct a nonagon by folding and knotting a strip of paper.
mathworld.wolfram.com
is a nonagon a polygon
In geometry, a nonagon or enneagon is a nine-sided polygon or 9-gon. The name nonagon comes from Latin nonogone and is attested in French and English since the 16th century.
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Nonagon Infinity
Reception
Upon its release, Nonagon Infinity received acclaim from music critics. Personnel
Credits for Nonagon Infinity adapted from liner notes.
wikipedia.org
en.wikipedia.org
nona-
nona- (before a vowel non-), comb. form of L. nōnus ninth. a. In scientific words, as nonagon, nonapeptide, nonic n. and a. b. spec. in Chem., used in naming the alkane with nine carbon atoms in its molecule, nonane, and compounds and radicals which contain a similar carbon chain, as nonoic acid, no...
Oxford English Dictionary
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Ennead (disambiguation)
architectural firm
See also
9
Octad (disambiguation) ('group of 8')
Decad (disambiguation) ('group of 10')
Enneagram (disambiguation)
Enneagon, or nonagon
wikipedia.org
en.wikipedia.org
Express sum of side and diagonal of a nonagon. For a regular nonagon, how can I express sum of the side and the smallest diagonal in terms of other lengths associated with nonagon? So far I have determined tha...
a right triangle of one of these isoceles trinagles cut in half) then the altitude from center to midpoint of side is $h*\sin 70$ and the side of the nonagon
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Angles in a nonagon The following figure was draw by taking midpoints on three sides of a regular nonagon. The angles are 20 degrees, 50 degrees, and 50 degrees.  ( _decagon_ , _nonagon_ , _heptagon_ , _dodecagon_ ). As per the same di...
No, those `-` words are basically rare loanwords and they're not used in ordinary math classes. (Of course is famous as the name of a building.) The dictionary entries you linked just say that the katakana word **means** , etc. They do not say that is read as , etc. does not seem to be in the same d...
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