obtuse An obtuse angle is an angle greater than 90° but less than 180°. An obtuse triangle is a triangle that contains an obtuse angle. The word comes from the Latin ob ("against") and tundere ("to beat") and thus refers to things that are blunt, dull, or rounded. Related category GEOMETRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |