The hexagon at one end has 6 edges. The hexagon at the other end also has 6 edges. And then, there are 6 edges joining the two hexagons together. So, in all, there are 6+6+6 = 18 edges.
A prism with bases that are n-gons has 3*n edges.
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A hexagonal prism has 8 sides, 12 vertices, and 18 edges.
A hexagonal prism has eighteen edges. Hexagonal prisms also have twelve vertices and eight faces, including two hexagonal bases and six rectangular faces.
It has 8 Faces 12 vertices and 18 edges
A hexagonal prism is a prism composed of two hexagonal bases and six rectangular sides.
A hexagonal prism has 6 rectangular faces.