Polygons are two dimensional shapes with straight sides. They can be described by the number of sides they have and whether the shape is regular or irregular. Where the straight sides of the ...

Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

A circle is not a polygon because it doesn’t have straight sides. Polygons can look quite different, but have the same name. For example, look at these two shapes and count the sides on each.