no
It is a cylinder
cornet
Look around you. Anything flat represents a plane geometric surface. Plane here means two dimensional; having length and width but not depth. The glass in the window, the top of the table or any other FLAT surface regardless of its shape. It can be square, rectangular, round triangular or duodecahedronal, so long as it is flat it is a plane geometry surface.
Surface area
A sphere has a surface but no flat face.
semi-circle
A plane is a flat surface
no
A a solid figure on a flat surface is a plane figure (I do believe)
Polyhedron is a geometric solid in three dimensions with flat faces and straight edges.
curve surface area
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
A sphere
The crust is the solid surface of the Earth.
According to my son's math homework a flat surface on a solid is called a face