The Answer Is 57.92 But the easiest way to do it is Rounding it
        
                    
             
        
        
        
Answer:
NVM MY BAD
x=19
quadrilateral have the internal degree sum of 360 
not 365 
 
        
                    
             
        
        
        
        
Using the cosine double angle formula,

(Note I took the positive case since  terminates in the first quadrant)
 terminates in the first quadrant)
Using the Pythagorean identity,

(Note I took the positive case since  terminates in the first quadrant)
 terminates in the first quadrant)
 
        
             
        
        
        
Answer:
Cf is the answer, Cf is also known as Californium.-
-Seth