obtuse angle

American  

noun

1. an angle greater than 90° but less than 180°.

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obtuse angle Scientific  

/ ŏb-to̅o̅s′ /

1. An angle whose measure is between 90° and 180°.

2. Compare acute angle

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obtuse angle Cultural  

1. An angle that measures more than 90 degrees but less than 180 degrees. (Compare acute angle and right angle.)

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Other Word Forms

• obtuse-angled adjective
• obtuse-angular adjective

Etymology

Origin of obtuse angle

First recorded in 1560–70

Example Sentences

“You have a more obtuse angle between your forehead and your nose here,” he said, smoothing a finger between the middle of his brows.

From The Guardian • Nov. 10, 2020

However, in the diagram, angle appears to be an obtuse angle and may be greater than 90°.

From Textbooks • Feb. 13, 2015

Soccer-style kickers hold their foot at a more obtuse angle at the moment of impact, which means some of the leg’s energy is absorbed by the flexing ankle joint.

From Washington Post • Oct. 17, 2011

If you leave the bevel where it is, you will have an obtuse angle, which is not sharp enough to turn.

From Time Magazine Archive

Generally to-day we define an obtuse angle as "greater than one and less than two right angles."

From The Teaching of Geometry by Smith, David Eugene