i would think it is south
One.
No. By definition a polyhedron has to have faces (flat surfaces), edges, and vertices. A sphere, hemisphere, and a cylinder are all solids but are not polyhedra.
A parallelepiped has 6 faces.
cube There are a great many solid shapes that have only flat surfaces.
Venus and Mercury also have solid surfaces.
There are 18 diagonals which are not on the surfaces of the prism.
A hemisphere, a cone.
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.