Answer:
The exterior angle of 60° is 120°. The exterior angle of 65° is 115°. The exterior angle of 55° is 125°.
Explanation:
The sum of the interior angle and the exterior angle is 180°. So you can subtract each interior angle from 180 and get the exterior angle.
180° - 60° = 120°
180° - 65° = 115°
180° - 55° = 125°
This is because you can imagine the lines of the triangle extending beyond the triangle. Then you can see where the other angles are. Hope this makes sense!