With the information given in the question, you may not assume that the sides are equal. So you will need to measure each side and add the results together.
I think you mean a regular nonagon. This is a nine-sided polygon. If you have the length of one side, you can multiply it by 9 to find the perimeter of all sides.
It is a nonagon which is a polygon that has 9 sides
Add the length of all nine sides up.
You add together the lengths of the nine sides of the nonagon.
Yes. A nonagon is a polygon with nine sides.
A nonagon
nonagon
A nonagon.
A polygon with nine vertices also has nine sides, and is therefore a "nonagon".
Nonagon.
A nonogon
nonagon