The angle between a side of a rectilinear figure and an adjacent side extended outward.
〔几何〕外角
Example sentencesExamples
In any triangle, if one of the sides be produced, the exterior angle is greater than either of the interior and opposite angles.
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.
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.
Definition of exterior angle in US English:
exterior angle
nounɪkˈstɪriər
Geometry
The angle between a side of a rectilinear figure and an adjacent side extended outward.
〔几何〕外角
Example sentencesExamples
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.
In any triangle, if one of the sides be produced, the exterior angle is greater than either of the interior and opposite angles.
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.