Given:
[tex]\angle2=123^{\circ}[/tex]
To find:
The angle 7.
Explanation:
We know that,
The sum of the exterior angles is supplementary.
So, we can write
[tex]\begin{gathered} \angle2+\angle7=180 \\ 123^{\circ}+\angle7=180 \\ \angle7=180-123 \\ \angle7=57^{\circ} \end{gathered}[/tex]
Therefore, angle 7 is 57 degrees.
Final answer:
Angle 7 is 57 degrees.
