20 points!!! please help 
Do 13, 14, 15, and 16
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer:
13. 360 14. 1080 15. x=53 16. x=135
Step-by-step explanation:
Equation: (n-2)*180
For 13. all angles in a a quadrilateral add up to 360
For 14. 8 sides-2=6. 180*6=1080 degrees
For 15. 15+155+137=307. 360-307=53. x=53 degrees
For 16. 6 sides-2=4. 4*180=720. 90*2=180. 720-180=540. 540/4=135.
x=135
 
                                
             
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Please report the picture, it is cut off :)