Interior and Exterior Angles of Triangles
The triangular structures on bridges, buildings, and other architectural designs may look like a triangle with an extended side similar to the figure below.
The angles located inside a triangle are called interior angles. An angle located outside a triangle and formed by a side and an extension of an adjacent side is an exterior angle of the triangle. In the figure, is an exterior angle of Angles A and B are called remote interior angles and is called an adjacent interior angle in relation to
Definitions
- An exterior angle of a triangle is an angle adjacent and supplementary to one of its interior angles.
- An adjacent interior angle of a triangle is an interior angle that forms a linear pair with the given exterior angle.
- The remote interior angles of a triangle are angles that are not adjacent to its given exterior angle.
