Question

help me.................

Answer 1

Hello Dear :) 
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As we know the formula :

$\frac{ n^{2}-3n }{2}$

Where n = number of sides 
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Suppose we have to find the diagonals of rectangle 
 
By putting values we got, 4² - 3 X 4 /2 = 16-12/2 = 4/2 = 2 diagonals 
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Similarly we can apply it on any polygon with 107 sides even 

put n = 107

$\frac{107^2 - 3 X 107}{2}$

$\frac{11499-321}{2}$

$\frac{11128}{2}$

5564 is the answer :) 
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