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Q.

How many diagonals does a hexagon have?


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a

9   

b

8  

c

2  

d

6 

answer is A.

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Detailed Solution

For determining the number of diagonals in a polygon we will use formula:
n n−3 2   where n   = sides of polygon.
We have n=6  ,
Applying the formula:
The number of diagonals in a polygon,
  = n n−3 2 = 6 6−3 2 =3×3 =9  
Hence, option 1 is correct.
 
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