What is your question that your asking?
        
             
        
        
        
Answer:
56.55
Step-by-step explanation:
2*3.14*9^2
 
        
             
        
        
        
Answer:
The answer is 1. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
30 degrees
Step-by-step explanation:
The angles must add up to 180 degrees and the triangles have the same angles.
 
        
                    
             
        
        
        
Strong, they are all close together and close to the line.