Answer:
The square of the hypotenuse is equal to the sum of the squares of the other two lengths.
Explanation:
only one that made sense
 
        
                    
             
        
        
        
Water boiling is an example of a physical change. The rest are chemical changes.  
Hope that helps!!
        
             
        
        
        
 N2O is nitrous oxide becuase of the nitrogen and oxygen
        
                    
             
        
        
        
I think its suicidal ideation......
I think