STUCK IN THIS. NEED HELP

Question

Given ⊙G and HJ¯¯¯¯¯¯¯¯ ≅ JK¯¯¯¯¯¯¯¯, what is ?

1. 
   
2. A.
3. 36
4. 
   
5. B.
6. 72
7. 
   
8. C.
9. 108
10. 
    
11. D.
12. 144

A. 36

B. 72

C. 108

D. 144

Answer 1

= 72°

Answer 2

Since HJ = JK, arc HJ = arc JK. Since arc JK = measure of its central angle (72), the arc HJ = 72 (B).