A polyhedron.
Polygon
It is called a polyhedron.
A cone
the flat surfaces of a solid figure are the
A SPHERE has no vertices and no FLAT surfaces
Polygon
A box is considered a hollow solid because it has solid walls enclosing an empty space inside. It is not a shell, which would imply a thin structure enclosing a space, nor a skeleton, which would typically refer to a supporting framework.
It is called a polyhedron.
Venus and Mercury also have solid surfaces.
A prism
A cone
the flat surfaces of a solid figure are the
Gas giants do not have solid surfaces like terrestrial planets do. Instead, their outer layers consist mainly of dense gases, such as hydrogen and helium. As you descend towards the core of a gas giant, the pressure and temperature increase immensely, but it does not transition to a solid surface.
vertexes
LxW
A sphere.
A cylinder