A face.
Sphere
Square
Edge
a sphere
you are a cone
A face.
A cylinder would fit the given description.
Cone
A cone fits the description.
A cone. If your definition of rolling includes the motion of a cone down an incline.
A a solid figure on a flat surface is a plane figure (I do believe)
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 flat surfaces of a solid figure are the
Only if you push it. On a perfectly flat surface, in neutral it will not roll without assistance.
a sphere
The crust is the solid surface of the Earth.
you are a cone
According to my son's math homework a flat surface on a solid is called a face
A face.
A face is the flat surface on a solid figure. For example, a triangular prism has five flat surfaces and therefore five faces.