þríhyrningur

== Icelandic == === Etymology === From þrí- (“tri-”, from þrír (“three”)) +‎ hyrningur (“polygon”). === Noun === þríhyrningur m (genitive singular þríhyrnings, nominative plural þríhyrningar) (geometry) a triangle ==== Declension ==== ==== Derived terms ==== ==== See also ==== hyrna