Hexagon
Hexagon – a polygon with 6 sides

Hexagons and six both contain an X.
Example 1

Honeycomb, like in a bee hive, is made up of many hexagons.
Example 2

Regular hexagons have sides that are all the same length. Irregular hexagons have sides that are different lengths.
Example 3

The internal angle between the sides of a regular hexagon is 120°. Internal angles are discussed in detail in the section Interior angles of polygons
Example 4

Hexagons can be convex or concave.