Respuesta :

9 because B is the midpoint of segment AC so it will be split down the middle so if segment BC is given to be 9 then the other segment AB is 9 also.

Answer:

AB = 9.

Step-by-step explanation:

Given  : Figure .

To find : What is the length of segment AB.

Solution : We have given Figure .

Line BD is perpendicular bisector of AC.

Then BC = 9

AB =  BC

AB = 9

Therefore, AB = 9.