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The answer will depend on whether the hexagons are all the same size or not, whether they come together in a plane or 3-dimensions, whether they can join at vertices or only sides.
Two hexagons, of the same size, that are coplanar can make a concave hendecagon (meet at side) or a concave dodecagon (meet at vertex).
Two concave hexagons can also join (dovetail) to make one hexagon.
The question is under-specified.
What else can I help you with?
What shapes do you need to make a hexagonal pyramid?
2 hexagons and six triangles
What shapes make up the net of a hexagonal prism?
Two hexagons and six rectangles
Can hexagons have different shapes?
yes
Which shapes have 6 sides?
hexagons
What are six sided shapes called?
Hexagons.
What is the name of the shapes with 6 sides?
Hexagons
How many shapes can be made from a hexagon?
Infinitely many. You can make a very, very long chain of hexagons, for example.
What geometrical shapes do crystals form?
Crystals form in the shapes of hexagons or six-sided prisms.
What shapes have the exact number of sides as a hexagon?
Other hexagons.
Are hexagons geological shapes?
A hexagon is a 6 sided polygon
What geometrical shapes show how crystals form?
Crystals form in the shapes of hexagons or six-sided prisms.
What are all six sided shapes called?
Hexagons, assuming they are polygons.
