It is called a Nonagon.
A polyhedron with 20 faces is called an icosahedron.
That's called a Decagon.
A figure that has 6 rectangular faces is called a rectangular prism .
octagonal prism
A solid figure with twenty faces is called an Icosahedron.
A decaredra is the ten face solid figure.
A polyhedron with 20 faces is called an icosahedron.
It is called a Nonagon.
A polyhedron with 20 faces is called an icosahedron.
That's called a Decagon.
A figure that has 6 rectangular faces is called a rectangular prism .
octahedron
octagonal prism
'Enneahedron' - a solid figure with nine faces
It is called a hexagon because it has six faces and also six vertexes.
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.