Definition of exterior angle in English:

exterior angle

Syllabification: ex·te·ri·or an·gle

noun

Geometry
The angle between a side of a rectilinear figure and an adjacent side extended outward.
More example sentences
  • Also the Pythagoreans knew the generalisation which states that a polygon with n sides has sum of interior angles 2n - 4 right angles and sum of exterior angles equal to four right angles.
  • In any triangle, if one of the sides be produced, the exterior angle is greater than either of the interior and opposite angles.
  • At each vertex of a triangle there are a couple of angle bisectors: a bisector of the interior angle and a bisector of the exterior angle.

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Pronunciation: ˈflipənt
adjective
not showing a serious or respectful attitude