Question Video: Finding the Sum of the Exterior Angles of a Triangle Mathematics • First Year of Preparatory School

Video Transcript

The figure shows the exterior angles of a given triangle. Find the sum of the exterior angles.

The three exterior angles are 135 degrees, 116.6 degrees, and 108.4 degrees. We’ve been asked to calculate the sum of the three angles. This means we need to add 135, 116.6, and 108.4. Adding these three numbers gives us a total of 360 degrees.

The sum of the exterior angles of the triangle is 360 degrees. We can go one step further here and say that the sum of the exterior angles of any triangle is equal to 360 degrees.