**Cylinder** (right circular cylinder) is a **solid of revolution** generated by rotating a rectangle or square about one of its sides.
**Surface area** of a right circular cylinder consists of 2 circles and one rectangle (or square).
A solid circular cylinder can be seen as the limiting case of a **n-gonal prism** where n approaches **infinity**.

The surface area of a right circular cylinder consists of the area of **top and bottom base** (which are equal) and **side**:

$$S=2\pi r^{2} + 2\pi rh $$

where,

πā Pi also referred to as **Archimedes' constant** is a mathematical constant, that is defined as the ratio of a circle's circumference to its diameter. It is approximately equal to 3.14159265359;

rā radius of a cylinder;

hā height of a cylinder.

$$V=\pi r^{2} h$$

In addition to right circular cylinders, other types of cylinders exist, which are not solids of revolution.