An (n – 2)^{2} sided figure has n diagonals. Find the number n diagonals for 25sided figure

A.
7 
B.
8 
C.
9 
D.
10
Correct Answer: Option A
Explanation
(n – 2)^{2} = 25
n – 2 = 25 = 5
n = 5 + 2
= 7
(n – 2)^{2} = 25
n – 2 = 25 = 5
n = 5 + 2
= 7