A pyramid is a solid figure with one vertix.
An irregular blob, an ellipsoid, a sphere, a toroid (doughnut) are some examples.
3d shape* * * * *It does not.A face is a plane (2-dimensional) part of the surface of a solid (3-dimnsional) object. Sometimes the term is includes curved surfaces, such as along the length of a cylinder.
sevan * * * * * No. A heptagon is a plane figure and so has only one face. It has 7 sides.
triangular prism
The sphere.
a face.
It is called a face.
cone
The answer is a cone
a face
A conic section.
a pyramid
It can be a sphere, a spheroid, an ellipsoid, etc.
A polygon is a many sided 2-dimensional figure, and thus could never be "solid" Alternatively, it could be "one face that is a polygon". In that case the solid could be like a pyramid that morphs into a cone or a part-sphere. The base would be the one polygon, the other face would not.
A square pyramid
It is a sphere.