interior angle

noun

1
: the inner of the two angles formed where two sides of a polygon come together
2
: any of the four angles formed in the area between a pair of parallel lines when a third line cuts them

Illustration of interior angle

Illustration of interior angle
  • agh
  • bgh
  • ghd
  • ghc interior angle 2

Example Sentences

Recent Examples on the Web With each interior angle measuring 108 degrees, three pentagons leave a gap and four begin to overlap. Marisa Sloan, Discover Magazine, 21 July 2021 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 Dehn focused on the interior angles formed where two faces of a three-dimensional shape meet. Quanta Magazine, 31 Oct. 2019 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 Both are three-dimensional structures, but each has a very different geometry: Their layouts are different, the curvature of their exteriors is different, their interior angles are different. Quanta Magazine, 9 Apr. 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'interior angle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1756, in the meaning defined at sense 1

Time Traveler
The first known use of interior angle was in 1756

Dictionary Entries Near interior angle

Cite this Entry

“Interior angle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interior%20angle. Accessed 28 Jan. 2023.

Kids Definition

interior angle

noun
: any of the four angles formed in the area between a pair of lines when a third line cuts them
Last Updated: - Updated example sentences
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