Cylinder : Learn the concept, to understand the different types and properties, study the curved surface and total surface areas, net and solved examples. Base – Each of the circular ends on which the cylinder rests is called its base. Axis – The line segment joining the centres of two circular bases is called the axis of the cylinder . Radius – The radius of the circular bases is called the radius of the cylinder . Height – The length of the axis of the cylinder is called the height of the cylinder . Lateral Surface – the curved surface joining the two bases of a right circular cylinder is called its lateral surface. Faces – A ... Cylinders are classified into various types, such as right circular cylinders , Oblique Cylinders, Elliptical Cylinders, and Cylindrical shells or Hollow Cylinders. A cylinder where the axis is perpendicular to the center of the base.