| Name | Name:Octadecagon | Name:Pentadecagon |
| Sides | Sides:18 | Sides:15 |
| Interior Angle | Interior Angle:160.00 | Interior Angle:156.00 |
| Sum of Interior Angles | Sum of Interior Angles:2880 | Sum of Interior Angles:2340 |
| Description | Description:A polygon with 18 sides is called an octadecagon | Description:A polygon with 15 sides is called a pentadecagon |
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