Interior Angle And Exterior Angle Definition. The sum of the internal angle and the external angle on the same vertex is 180. Exterior Angles of Polygons Interior Angles Interior Angles of Polygons Supplementary Angles Angles On a Straight Line Straight Angle Degrees Angle Geometry Index.
Exterior and Interior angles are supplementary At any given vertex the interior angle is supplementary to an exterior angle. In the above-given figure you can see two parallel lines are intersected by a transversal. Alternate Interior Angles Definition.
The angles that are opposite of each other are the alternate exterior angles.
In contrast an exterior angle or external angle is an angle formed by one side of a simple polygon and a line extended from an adjacent side. The angles which are formed inside the two parallel lines when intersected by a transversal are equal to its alternate pairs. Together the adjacent interior and exterior angles will add to 180 180. Quadrilaterals are 2D shapes with four sides and angles.