The most common pyramids are square-based, rectangular-based and triangular-based pyramids. The area of the base is \(5 \times 5 = 25cm^2\) The area of each triangular face is \((5 \times 6) \div 2 = ...

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\(\text{volume of a pyramid} = \frac{1}{3} \times \text{area of base} \times \text{perpendicular height}\) The area of the base is \(5 \times 5 = 25~cm^2\). The area of each triangular face is \((5 ...

A boy who was struggling at school is now a maths genius after his mum taught him to use an abacus - which she says can help today's children. Dr Rashmi Mantri, 45, used the ancient technique she ...