The angle 4 and angle 55 degree are pair of corresponding angle. So,
[tex]\angle4=55[/tex]
The angle 4 and angle 1 are pair of linear angles. So,
[tex]\begin{gathered} \angle1+\angle4=180 \\ \angle1+55=180 \\ \angle1=180-55 \\ =125 \end{gathered}[/tex]
So measure of angle 1 is 125 degree.
