Answer:
the answer is c
Step-by-step explanation:
 
        
             
        
        
        
I really do wish I could help But I’m not sure I tried to figure it out and i just can’t get it
        
             
        
        
        
Add all values together which is 371 
and all the numbers plus one more is 8
which means 52x8 would be the total sum of all the numbers which is 416
so 416-371 is the last value which is 45
        
                    
             
        
        
        
The single line marks indicate the two lines have the same length. Thus, the unknown length is 3 cm. 15 mm = 1.5 cm, 25 mm = 2.5 cm. The rest is trivial.