Answer:
[tex]m\angle ABC=23^o[/tex]
Step-by-step explanation:
we know that
Central angle is the angle that has its vertex in the center of the circumference and the sides are radii of it
The measure of arc ADC is 23 degrees
BA=BD=BC ----->are radii of the circle B
therefore
[tex]m\angle ABC=arc\ ADC[/tex] ----> by central angle
therefore
[tex]m\angle ABC=23^o[/tex]
