exterior angle

noun

1
: the angle between a side of a polygon and an extended adjacent side
2
: an angle formed by a transversal as it cuts one of two lines and situated on the outside of the line

Illustration of exterior angle

Illustration of exterior angle
  • ega egb fhc fhd exterior angle 2

Examples of exterior angle in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
It is known that the sum of the exterior angles of a convex polygon is always 360º. Since an exterior angle of a right angle is also a right angle, our four right angles would take up the entire 360º of the octagon’s exterior-angle measure. Quanta Magazine, 18 Nov. 2020 It is known that the sum of the exterior angles of a convex polygon is always 360º. Since an exterior angle of a right angle is also a right angle, our four right angles would take up the entire 360º of the octagon’s exterior-angle measure. Quanta Magazine, 18 Nov. 2020

Word History

First Known Use

1756, in the meaning defined at sense 1

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

Dictionary Entries Near exterior angle

Cite this Entry

“Exterior angle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exterior%20angle. Accessed 16 Nov. 2024.

Kids Definition

exterior angle

noun
: any of the four angles formed by a line cutting across two other lines and located on the outside of those lines
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