There are regular polygons (with 3, 4 and 6 sides).There are irregular convex polygons (with 3, 4, 5 or 6 sides). There are [irregular] concave polygons with various numbers of sides.
hexagon
Regular polygons with 3, 4 or 6 sides.
Shapes with straight sides are called polygons
Regular polygons with even sides if there are 6 or more of them; selected irregular polygons with seven or more odd numbers of sides.
There are regular polygons (with 3, 4 and 6 sides).There are irregular convex polygons (with 3, 4, 5 or 6 sides). There are [irregular] concave polygons with various numbers of sides.
hexagon
quadrilaterals only have for sides and polygons have 5-6
You can name the sides any way you like.
Regular polygons with 3, 4 or 6 sides.
nonacontagon
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polologous
It means many sides
pentagon
Shapes with straight sides are called polygons
For regular polygons: 3, 4, or 6. For irregular polygons, figures with any number of sides can be found.