Answer:
13.8 miles a gallon 
Step-by-step explanation:
I think this because 345 divided by 25 equals 13.8 which would mean 13.8 miles for every gallon
 
        
                    
             
        
        
        
C- I’m assuming that you meant to say that they have one angle that is equivalent to another 
All isosceles triangles have two sides that are of equal length
        
             
        
        
        
Can you explain more , im willing to help .. Be more exquisite