posted by bethy .
The measures of 5 of the interior angles of a hexagon are: 130°, 120°, 80°, 160°, and 155°. What is the measure of the largest exterior angle?
Each pair of interior-exterior angles are supplementary, that is, they add up to 180°
Which of course means, that the smallest interior angle will have the largest exterior angle.
I hope you realize that there is a missing angle.