The minimum number of sides that a polygon must have is 3
        
             
        
        
        
Answer:
Yeah same here
Step-by-step explanation:
 
        
             
        
        
        
Answer:
-3
Step-by-step explanation:
its the middle number so you put them in order and get the ndeswer just whatevers in the midde
-9 -6 -3 -2 8
 
        
                    
             
        
        
        
Answer: 
b. The supplements of congruent angles are congruent
Explanation:
Note that 

 is a supplement of 

 and 

 is a supplement of 

. 
Since 

, 

 because 
the supplement of the congruent angles are congruent.