Answer:
x=2
Step-by-step explanation:
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<span><span>Each time
we add a side (triangle to quadrilateral, quadrilateral to pentagon, etc), we </span>add
another 180°<span> to the total of the
interior angle.</span></span>
 
Triangle,
sum interior angle is 180
Square,
is 360
Pentagon is
540
 
So the
formula is
<span>180 ( n –
2 )</span>
        
                    
             
        
        
        
On all of them sorry but if i dont know wich one to do then....