1. The problem statement, all variables and given/known data Hello! Please, take a look at the exercise I post below. I have solved it correctly, and I understand how to solve it; so no problems here. But what I do have a problem with is the size of the angle between two points. Please, see details below. I will be grateful for your help and explanation. 2. Relevant equations From a point 300 feet above level ground in a firetower, a ranger spots two fires in the Yeti National Forest. The angle of depression made by the line of sight from the ranger to the first fire is 2.5° and the angle of depression made by line of sight from the ranger to the second fire is 1.3°. The angle formed by the two lines of sight is 117°. Find the distance between the two fires. 3. The attempt at a solution I found the correct distance, no issues here (it's around 17455), but how can the angle between two lines of sight be equal to 117°, if one angle of depression is 2.5° and another is 1.3°, which if combined are only 3.8°. 180° - 3.8° is far from 117°. See my "drawing" attached. How can that angle be 117°? Thank you!