Geometry: Solve for angles of a triangle w/line intersecting

[Jacob Dale]

My mother's boyfriend's son who is in 6th grade asked me a question about the math they are learning. I thought it wouldn't be too bad but I cannot for the life of me figure it out. A solution would be greatly appreciated.

1. Homework Statement
https://postimg.org/image/1tsa4v4t8r/

Homework Equations

https://www.mathsaccelerator.com/geometry/angle-rules

The Attempt at a Solution

I tried my best but my best wasn't good enough.

 

[magoo]

I'm not sure what your question is. Are you asking why the third angle is 55 degrees or what are you asking? Please clarify and we'll try to help.

 

[LCKurtz]

Since the angles e and f are labeled, and since there is not enough information to determine them, I'm guessing there is more to the question than calculating the $55^\circ$. Please state the whole problem.