Question

Question 66
Fill in the blanks to make the statements true.
The number of diagonals in a hexagon is ___.

Answer 1

We know that, number of diagonals of a n-gon $=\frac{n(n-3)}{2}$.
Here, $n=6$, therefore the number of diagonals $=\frac{6(6-3)}{2}=\frac{6\times 3}{2}=9$.