Obtuse

usgb/əbˈtuːs/
adjective

An angle that is more than 90 degrees but less than 180 degrees.

In a right triangle, one angle is 90 degrees and the other two are obtuse.
Visual representation of "obtuse" - An angle that is more than 90 degrees but less than 180 degrees.

Often appears as...

  • obtuse angle
  • obtuse triangle

Usage tips

Academic

Definition 1 of 3
Visual representation of "obtuse"
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Geometry Term

Used specifically in mathematics to describe angles greater than 90 degrees.

Illustration for Geometry Term
Could you draw an obtuse angle on the board?
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Visually Identifiable

Usually looks wider than a right angle when drawn or seen.

Illustration for Visually Identifiable
That corner looks obtuse; it's definitely not 90 degrees.
Visual representation of the word "Obtuse"

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