obtuse angle

noun

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

obtuse angle

/ ŏb-to̅o̅s′ /

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 Words From

• ob·tuse-angled ob·tuse-an·gu·lar [uh, b-, toos, -, ang, -gy, uh, -ler, -, tyoos], 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.

From 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.”

From New York Times

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

From The Guardian

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

From Literature

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

From The Guardian