Shapes/Polygons

[mh1]

Can anyone (Guest55) please provide an explanation for the answer to the following question:

Q: Which of the following shapes has nine diagonals?
A: Hexagon

I'm terribly confused by this question.

[Guest55]

A diagonal is a line from one vertex to another. So sketch a hexagon and join up every diagonal:

[mh1]

Guest55

You're a breadth of fresh air.

Many thanks