# Cylinders, cones and spheres

**Volume of a cylinder**

A **cylinder** is a type of prism with a circular cross-section and the volume is calculated using the following formula where *r* is the radius and *h* is the height:

Volume = π*r*²*h*

Point to note: the are of a circle is π*r²*.

**Surface area of a cylinder**

The formula for the surface area of a cylinder is represented using the following formula where *r* represent the radius, *h* represents the height:

Surface area = 2π*r*(*h + r)*

**Volume of a cone**

A **cone** is a type of pyramid with a circular base and is respresented using the following formula where *r* represent the radius, *h* represents the height:

Volume = 1/3 π*r²**h*

**Volume and surface area of a sphere**

A **sphere** is a 3-D shape with a surface which is always the same distance from the centre. The volume is represented using the following formula where *r* represents the radius.

Volume = 4/3 π*r²*

The surface area of a sphere is represented using the following formula where *r* represents the radius.

Surface area = 4π*r²*