Polygon with nine sides. 
Symbol used to represent a number. 
Number above the line of a fraction, shows the number of parts of the whole. | N | ||
|---|---|---|
| Negative Number | A number less than zero | |
| Nonagon | Polygon with nine sides. | |
| Number Line | Line marked with numbers, used to show operations. | |
| Numeral | Symbol used to represent a number. | |
| Numerator | Number above the line of a fraction, shows the number of parts of the whole. | |