Question

The number of diagonals in a hexagon is

• A. 8
• B. 9
• C. 10
• D. 11
• E. 12

Answer 1

Answer: (B)

The number of diagonals in a $n$ -side polygon
$=\frac{n(n-3)}{2}$
$\therefore$ Number of diagonals in a hexagon
$=\frac{6(6-3)}{2}$
$=9$