Partitioning a general hexagon into 18 congruent parts is normally impossible.
A hexagonal prism has 18 edges.
18
A regular hexagon that has a perimeter of 18 units of measurement
One hexagon has six sides, so 18 hexagons have 6 * 18 = 108
18
The perimeter of such an equilateral hexagon is 54. The circumference of the largest cricle that can be inscribed in it is 18 pi. Hope that helps! That was if you meant the diameter as the length of the longest line that fits in the shape.
The answer would be 18.
Assuming diagolas is your way of spelling diagonals, the answer is 18.
18 straws.
30
The total number of diagonals for a convex (or concave) polygon, a hexagon being of the former type, is given by the equation (n2 - 3n)/2, where n is the number of sides of the polygon. A hexagon has 6 sides, so plugging the number 6 into the above equation for n, one finds that a hexagon has: [62 - 3(6)]/2 = (36 - 18)/2 = 18/2 = 9 diagonals.
6 parts Nitrogen, 12 parts Potash and 18 parts Pottassium.