See attached pdf file for problem and diagram regarding angles.© BrainMass Inc. brainmass.com March 4, 2021, 6:41 pm ad1c9bdddf
Please refer to the attached figure as you read on..
from the figure, Angle XAC = Angle ACF
This is using the fact that, a straight line falling on parallel straight lines makes the alternate angles equal to one another, ...
The problem is solved giving all necessary mathematical steps. It will enable you to do similar problems yourself.