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