how can I find L1 and L2 in a corresponding angles?

,When two parallel lines intercept a line in 2 different places the angles formed between the lines should be the same, graphically it should look like this:
According to this we can say that:
[tex]\begin{gathered} L1=L4 \\ L2=L3 \\ THEN, \\ L1=75.1 \\ L2=104.9 \end{gathered}[/tex]