Exterior angle
1. Exterior angle of a polygon
The angle formed by a side of a polygon and the extension of its adjacent side
2. Exterior Angles of a transversal
Exterior angles are created where a
transversal
crosses two (usually parallel) lines. Each pair of these angles are outside the parallel lines, and on the same side of the transversal. Each pair of exterior angles is
supplementary (add up to 180°).
Definition and properties of alternate exterior angles, showing the pairs of angles associated with a transversal
The exterior angles of a polygon and the method for calculating their values.
Definition and properties of the exterior angles of a transversal
A discussion and example of how the interior and exterior angles of a polygon are related, especially when the polygon is concave.
The definition and characteristics of the exterior angles of triangles
The definition and characteristics of the exterior angles of triangles
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