What Is The Triangle Abc’S Exterior Angle?

The exterior angle of a triangle is the angle formed between one side and the extension of its adjacent side. There are three exterior angles in a triangle, and the sum of the exterior angles is always equal. The exterior angle theorem states that if any side of a triangle is extended, then the exterior angle so formed would be equal to the sum of the measures of the two opposite interior angles of the triangle.

Every triangle has six exterior angles (two at each vertex are equal in measure). The exterior angles, taken one at each vertex, always sum. The exterior angle of a triangle is formed when one side of a triangle is extended. The nonstraight angle (the one that is not just the extension of the side) outside the triangle, or the nonstraight angle, is formed by any side of a triangle and the extension of its adjacent side.

The exterior angle of a triangle is equal to the sum of the two remote interior angles of the triangle. In this case, ∠A and ∠B are the two interior angles of the triangle. The exterior angle is ∠ABX = 140°.

In a triangle ABC, the exterior angle is formed by extending side AB or side BC. The measure of any exterior angle of a triangle is equal to the sum of the measures of the opposite interior angles. Two exterior angles of a triangle measure 135° and 100°. To find all the angles of the triangle, there are two key concepts: finding the first exterior angle at a vertex and finding the other interior opposite angles.