# Definition of *exterior angle* in English:

## exterior angle

Line breaks: ex|ter¦ior angle### 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.