A polygon is a two-dimensional shape with straight sides. A polygon can have three or more sides. Here are the names of polygons with the following numbers of sides:
- 3 sides – triangle
- 4 sides – quadrilateral
- 5 sides – pentagon
- 6 sides – hexagon
- 7 sides – heptagon or septagon
- 8 sides – octagon
- 9 sides – nonagon
- 10 sides – decagon