Hey
Your answer is pretty simple 
1/√2
Don't forget to mark Brainliest :^)
        
             
        
        
        
Answer:
It is c and d. If this helps you are welcome
Step-by-step explanation:
 
        
                    
             
        
        
        
6. 7/3
8. 7/3 
please don't get mad if these answers are wrong
        
             
        
        
        
9514 1404 393
Answer:
   107°
Step-by-step explanation:
Opposite angles of an inscribed quadrilateral are supplementary.
   X = 180° -Q
   X = 180° -73° = 107°