Question 1192639
.
<pre>

Hexagon has 6 vertices and 6 sides.


The number of diagonals of every n-gon is  {{{(n*(n-3))/2}}}.


For hexagon, the number of diagonals is  {{{(6(6-3))/2}}} = {{{(6*3)/2}}} = 3*3 = 9.    <U>ANSWER</U>
</pre>

Solved.



Draw a hexagon on your own.