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Glite Dictionary
obtuse triangle

obtuse triangle

1 3.3
A triangle with one angle larger than 90 degrees
  • noun
  • /əbˈtus ˈtraɪæŋɡəl/
  • Specialized
translation icon : triángulo obtuso
  • An obtuse triangle has one angle that measures more than 90 degrees, making it unique among triangles.

Examples

  • In geometry, students learn that an obtuse triangle can be identified by its one angle that is greater than 90 degrees.

  • During the math class, the teacher explained that an obtuse triangle features an angle larger than a right angle.

  • We know even more obtuse triangles are good because these are slender.

  • Well, so again, if the obtuse triangle is rational, then there are periodic orbits.

Synonyms

obtuse-angled triangle
vsobtuse triangle
  • Specialized
4.7

A triangle with one angle greater than 90 degrees

adds that the same angle is less than 180 degrees

Antonyms

acute triangle
  • Specialized
3.9

A triangle with all three angles less than 90 degrees

How Pointed

acute triangle
  • Specialized
3.9
right triangle
  • Specialized
2 3.2
obtuse triangle
  • Specialized
1 3.3

Surface Forms

obtuse triangle singular
obtuse triangles plural

Morphology

obtuse + triangle

The phrase is fully compositional: an adjective 'obtuse' (an angle between 90° and 180°) modifies 'triangle' (a three-sided figure), so a learner who knows both words can infer it refers to a triangle that has an obtuse angle. This adjectival modification pattern is standard in mathematics and cross-linguistically common, making the term immediately understandable to learners who know the constituents.

Etymology

Obtuse triangle The name obtuse triangle comes from obtuse, which means 'blunt' or 'wide', and describes a triangle with one angle bigger than a right angle. So the phrase helps you remember that one angle in the triangle is larger than 90 degrees.