Answer:
Option A. [tex]x=34\°[/tex]
Step-by-step explanation:
we know that
The measure of the inner angle is the semi-sum of the arcs comprising it and its opposite.
[tex]x=\frac{1}{2}(arc\ CD+arc\ AB)[/tex]
substitute the values
[tex]x=\frac{1}{2}(23\°+45\°)[/tex]
[tex]x=34\°[/tex]
