Achtzehneck
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German
| ← 17 | 18 | 19 → |
|---|---|---|
| Cardinal: achtzehn Ordinal: achtzehnte Sequence adverb: achtzehntens Ordinal abbreviation: 18. Adverbial: achtzehnmal Adverbial abbreviation: 18-mal Multiplier: achtzehnfach Multiplier abbreviation: 18-fach Fractional: Achtzehntel Polygon: Achtzehneck Polygon abbreviation: 18-Eck Polygonal adjective: achtzehneckig Polygonal adjective abbreviation: 18-eckig | ||
| German Wikipedia article on 18 | ||
Alternative forms
Etymology
Pronunciation
Noun
Achtzehneck n (strong, genitive Achtzehneckes or Achtzehnecks, plural Achtzehnecke)
- octadecagon
- Synonym: Oktodekagon
- ein regelmäßiges Achtzehneck ― a regular octadecagon
Declension
Declension of Achtzehneck
| singular | plural | ||||
|---|---|---|---|---|---|
| indef. | def. | noun | def. | noun | |
| nominative | ein | das | Achtzehneck | die | Achtzehnecke |
| genitive | eines | des | Achtzehneckes, Achtzehnecks | der | Achtzehnecke |
| dative | einem | dem | Achtzehneck, Achtzehnecke1 | den | Achtzehnecken |
| accusative | ein | das | Achtzehneck | die | Achtzehnecke |
1Now rare, see notes.
Hypernyms
Coordinate terms
- Dreieck, Sechseck, Neuneck
- Zehneck, Elfeck, Zwölfeck
- Fünfzehneck, Sechzehneck
- Siebzehneck, Neunzehneck
- Zwanzigeck, Achtundzwanzigeck
- Vierzigeck, Achtundvierzigeck