Octagonal pyramid
A six-sided polygon is called a hexagon
A six-sided shape is called a hexagon.
A six sided polygon is an hexagon
Hexagon
A hexagon.
hexagon?
Hexagon
hexagon
A hexagon.
hexagon
A six sided polyhedron is a hexahedron. This may be a triangle based dipyramid, a pentagonal pyramid of a variant of a parallelepiped.