Answer:
Part 1) Triangles ABC, DBG, DEF and BEH are similar
Part 2)  
 
Step-by-step explanation:
Part 1) 
we know that    
If two triangles are similar, then the ratio of its corresponding sides is equal and its corresponding angles are congruent
In this problem Triangles ABC, DBG, DEF and BEH are similar, because its corresponding angles are congruent by AA Similarity Theorem
Part 2) 
Remember that 
If two triangles are similar, then the ratio of its corresponding sides is equal
therefore
 
 
 
        
                    
             
        
        
        
It can be factored. 
We need two numbers that multiply to -12 and add to -4, so are two terms would be -6 and 2.
(x - 6) (x + 2) = 0 
x = 6 
x = -2
        
                    
             
        
        
        
Answer:
It is the 3rd one.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
a
Step-by-step explanation:
one of the vertexes have a different rotation size than the other
also i used a protractor
( plz mark me as brainliest, that would be most appreciated! )