A hexagon has exactly six vertices. A hexagon is a six-sided, two-dimensional shape. A regular hexagon consists of six equal sides with internal angles of 120 degrees, while an irregular hexagon can have sides and angles of any size.
In order for a six sided shape to be classified as a hexagon, it must satisfy two conditions. As with any shape, the sides must all join together and form a closed shape. Secondly, all sides of a hexagon must be straight, not curved. Hexagons are often seen in nature, most commonly as the shape of honeycombs in bee hives.