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
hemispheres and deg (degrees) are not compatible. solid angles are measured in steradians of spheres 2pi steradians or 0.5 spheres in a hemisphere In cartography, a hemisphere would encompass 180 degrees of longitude.