Question

Number of diagonals of a convex hexagon is

• A. $3$
• B. $6$
• C. $9$
• D. $12$

Answer 1

Answer: (C)

$9$

$\Rightarrow$ Number of diagonals = $\frac{n(n-3)}{2}$

$=\frac{6(6-3)}{2}$

$=3\times 3=9$