'Enneahedron' - a solid figure with nine faces
A decaredra is the ten face solid figure.
Such a figure is a pyramid.
A polygonal pyramid.
A cube is a solid figure called a polyhedron. A polyhedron is a solid figure with all flat faces. So a cone would be a solid figure but not a polyhedron becasue it has a curve and does not have all flat faces.
a polygonal prism or a polygond
It is a prism.
a rectangular pyramid and a square pyramid