Answer:
Exterior angles of a triangle are angles formed by one side of the triangle and the extension of its adjacent side. It is the angle between the two sides of the triangle when one side is extended. It is equal to the sum of the two interior angles of the triangle that are not adjacent to the exterior angle. For example, if one exterior angle of a triangle is 40 degrees, then the sum of the two interior angles that are not adjacent to the exterior angle must be 140 degrees.
Explanation: