There is only one "hexagon" : it's a polygon with six sides. Now if you mean Polygons, there are infinite. starting with the triangle and then a new one every time you add a side to the current shape. (ex: triangle + one side = square; square + one side = pentagon; and so on...). All of this to the point were you cannot count/see the sides because they're too many and small and you get a Circle.
None. Though there can be ten if the hexagons are concave hexagons.
6
There are 78 sides.
18 sides
7
20 hexagons
4 hexagons; A hexagon has 6 sides, thus, if you have 4 hexagons, 4x6=24
there is 7 hexagons in the design
None. Though there can be ten if the hexagons are concave hexagons.
6
They have 6
None.
6
how many vertices does 3 hexagons and 8 rectangles have all together
One hexagon has six sides, so 100 hexagons have 600 sides.
15
twelve