Answer:
20-gon
Step-by-step explanation:
First we start with the formula  to find what the sum of angles will be if we know the number of sides.  
S=(n-2)*180 where S is the sum of angles and n is the number of sides.
Normally you'd plug in n to find S, but you can do the opposite too.
3240=(n-2)*180
Let me know if you need help working it from here.   
 
        
             
        
        
        
1/4= 0.25
2/4= 1/2 = 0.5
0.25 x 0.5 = 0.125
0.125 = 1/8
        
             
        
        
        
Answer:

Step-by-step explanation:



 
        
                    
             
        
        
        
Answer:
80/89
Step-by-step explanation:
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Answer:
-4409/100
bcoz there is decimal next to 2 numbers