Answer:
I exactly don't know the answer
What is your question...?
Answer:

Step-by-step explanation:
We are given that Point C is in the interior of ∠ABD
We are also given that ∠ABC ≅ ∠CBD
Now ,

Since we are given that ∠ABC ≅ ∠CBD
So, 


Hence 
Your answer is Option C) 9