Bees use it to store honey.
A regular hexagon and some irregular ones will tessellate, But in general they will not.
No, a hexagon is not a tessellation. Some hexagons can tessellate a plane, others will not.
As far as I know, a hexagon has 6 angles whether it is regular or not. Some may be obtuse angles, but they still count. So a hexagon where some of the sides go 'in' rather than 'out' is still a hexagon.
You measure them. In some cases, you may know some other information about the hexagon, in that case you may be able to calculate them.
No, only some can.
A hexagon cannot have a sum. There can be the sum of its interior angles, its exterior angles, its side lengths, its area (and that of some other area), or other characteristics, but not of a hexagon.
1080 degrees
An irregular hexagon, which has sides and angles of varying lengths and measures, doesn’t have specific alternative names like regular polygons do. However, it can be referred to as a "non-regular hexagon" or simply described as a "hexagon with unequal sides." In some contexts, it may also be called an "unequal hexagon."
When referring to it as a hexagon is not a faux pas.
A hexagon...
A hexagon deck is a unique design that can add an element of fun to your home. You can find some examples of hexagon deck plans at the following websites: decks.com deckplans.com creativehomeowner.com
a hexagon has 6 sidesAn hexagon is a 6 sided polygon