obtuse-angled triangle
- noun
- /əbˈtusˌæŋɡəld ˈtraɪæŋɡəl/
- Specialized
:
triángulo obtuso
- An obtuse-angled triangle has one angle that measures more than 90 degrees.
Examples
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Likewise, triangles were classified generally as acute-angled triangles, right-angled triangles, and obtuse-angled triangles.
Blog text (29) -
To identify an obtuse-angled triangle, look for the angle that exceeds 90 degrees.
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In geometry class, we learned that an obtuse-angled triangle can look quite different from an acute-angled triangle.
Synonyms
1
3.3
A triangle with one angle larger than 90 degrees
Antonyms
How Pointed
- Specialized
- Specialized
2
3.2
- Specialized
Surface Forms
Morphology
obtuse-angled + triangle
The phrase is fully compositional: 'obtuse' (an angle greater than 90°) combined with 'angled'/'angle' plus 'triangle' (a three-sided figure) yields the meaning directly — a triangle that has an obtuse angle. This is standard mathematical terminology and mirrors constructions in many languages, so a B1 learner who knows the constituent words would readily deduce the meaning.
Etymology
Obtuse-angled triangle gets its name from the word obtuse, which means 'blunt' or 'wide', and from the word angle meaning a corner. Imagine one corner of the triangle that is wide and open, more than a right angle, so the triangle has one angle 'greater than 90 degrees'.