Of course not all 3D shapes are prisms. Let’s write down and memorise the formulae for the surface area and volume of some other 3D shapes:

Examples

• A pyramid has a square base of side 5m and vertical height 4m. Draw a sketch of the pyramid and find its volume
• Calculate the radius of a sphere with volume 500cm³
• Find the volume of the following cone:

• A cone has base diameter 18cm. The height of the cone is 20cm.  Calculate the volume of the cone, leaving your answer in terms of π.

Exercise

Let’s complete exercises 25 and 26 from pages 34 and 35 of the core textbook:

The answers are below: