The volume of a 3D shape is the amount of space inside it. Volume is measured in cubic units such as cm³ and m³. The volume, or capacity, of liquids is measured in millilitres or litres. The surface ...

The area of the base is \(5 \times 5 = 25~\text{cm}^2\). The area of each triangular face is \((5 \times 6) \div 2 = 15~\text{cm}^2\). There are four identical triangular faces, so the total surface ...