Answer:
8
Step-by-step explanation:
9 - 1 = 8
x = 8
I'm pretty sure it's A.
But don't count on it
1) and bisect each other (given)
2) (a bisector splits a segment into two congruent parts)
3) (a bisector splits a segment into two congruent parts)
4) (vertical angles are congruent)
5) (SAS)
6) (CPCTC)
7) (converse of alternate interior angles theorem)
8) (vertical angles are congruent)
9) (SAS)
10) (CPCTC)
11) (converse of alternate interior angles theorem)