The Great Pyramid of Giza is often treated as a monument of stone, but it also functions as a monument of numbers. I see at ...

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