De or het tienhoek?

The correct Dutch article is:

de tienhoek

  • English: decagon
  • Plural: de tienhoeken
  • Diminutive: het tienhoekje
Meaning (Dutch) (meetkunde) figuur met tien hoeken

How to use tienhoek

the decagonde tienhoek
this decagondeze tienhoek
that decagondie tienhoek
our decagononze tienhoek
your decagonjouw tienhoek
every decagonelke tienhoek
which decagon?welke tienhoek?
a big decagon / the big decagoneen grote tienhoek, de grote tienhoek
the decagon (plural)de tienhoeken, deze tienhoeken

Dutch words ending in tienhoek

vijftienhoek | negentienhoek | zeventienhoek | dertienhoek | veertienhoek | zestienhoek | achttienhoek

In compound words, the last part decides the article. See the rule

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).