Discover how to work out the area of a triangle, by working out the area of a rectangle and then dividing ... in millilitres and litres. What is volume? Find out how the volume of a 3D shape ...

Image caption, The rectangular faces can be combined to form ... 8 × 20 = 160. The volume of the prism is 160 cm³. The cross-section of the prism is a triangle. First work out the area of ...