we have:
[tex]\text{arcAB}=\text{arcBC}=110[/tex]
then
[tex]\text{arcAC}=360-\text{arcAB}-\text{arcBC}=360-110-110=140[/tex]
so,
[tex]\begin{gathered} \angle ABC=\frac{1}{2}arcAC \\ \angle ABC=\frac{1}{2}(140) \\ \angle ABC=\frac{140}{2} \\ \angle ABC=70 \end{gathered}[/tex]
answer:
