Answer:
[tex]\huge\boxed{x^o=80^o}[/tex]
Step-by-step explanation:
Look at the picture.
We have:
[tex]l=160^o[/tex]
Therefore
[tex]2\alpha=160^o[/tex] divide both sides by 2
[tex]\dfrac{2\alpha}{2}=\dfrac{160^o}{2}\\\\\alpha=80^o[/tex]
