单词	exterior angle
释义	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 ega egb fhc fhd exterior angle 2 Example Sentences Recent Examples on the Web 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
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