Question

the number of diagonals of a n-sided ,then number of its sides is

Answer 1

If a polygon with n-sides then its has

$\frac{1}{2} n(n - 3)$

Hope it helps u : )

Answer 2

hey mate here is ur ans
number of sides is n
then number of diagonals =n(n-3)/2
eg
quadrilateral has 4 sides and 2 diagonals
=>4*(4-3)/2=4*1/2=2
proved