exterior angle
noun Geometry.
an angle formed outside parallel lines by a third line that intersects them.
an angle formed outside a polygon by one side and an extension of an adjacent side; the supplement of an interior angle of the polygon.
Origin of exterior angle
First recorded in 1885–90
Words nearby exterior angle
British Dictionary definitions for exterior angle
exterior angle
noun
an angle of a polygon contained between one side extended and the adjacent side
any of the four angles made by a transversal that are outside the region between the two intersected lines
Scientific definitions for exterior angle
exterior angle
[ ĭk-stîr′ē-ər ]
The angle formed between a side of a polygon and an extended adjacent side. Compare interior angle.