According to my son's math homework a flat surface on a solid is called a face
It's called a face
The flat surface of a solid figure is called a face. For example, a rectangular prism has 6 flat surfaces and therefore 6 faces.
The crust is the solid surface of the Earth.
A face.
A face is a flat surface. The only solid with no flat surfaces is a sphere.
The flat side of a three dimensional solid is called the face. The total area of all of the faces is called the surface area.
A face
A face.
Cone
A flat surface of a solid is usually the face of the solid. +++ Also sometimes called a "facet", particularly on solids having very many flat faces.
A sphere has a surface but no flat face.
yes and no it depends on what it is