/ Thesaurus / O Synonyms of obtuse triangle Find synonyms for: Noun1. obtuse triangle, obtuse-angled triangle, triangle, trigon, trilateralusage: a triangle that contains an obtuse interior angleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language