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

CRYSTAL pyramids have been found beneath the Bermuda Triangle and could be responsible for ships and planes disappearing, it has been claimed. Giant pyramids “three times the size of the Great Pyramid ...

A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...

A strange theory suggesting that a huge crystal pyramid lies 2,000 metres below the Bermuda Triangle has re-emerged. The theory claims that 'scientists' discovered the mysterious structure in 2012, ...