obtuse angle

noun

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

obtuse angle

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

2. Compare acute angle

obtuse angle

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

Other Word Forms

• obtuse-angled adjective
• obtuse-angular adjective

Word History and Origins

Origin of obtuse angle¹

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.

Read more on The Guardian

In 2018, a math teacher at Friends Seminary, a private Quaker school in downtown Manhattan, was fired after he demonstrated an obtuse angle by pointing his arm forward and saying, “Heil Hitler.”

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But equally, she knows she could still look at the world from even more obtuse angles.

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In math I spent the entire time thinking about how Momly's arm was probably at an obtuse angle when it broke.

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The acute and sometimes obtuse angles of Bob Dylan’s career have teased and infuriated his public for more than half a century.

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