A glass sculpture in the shape of a square based pyramid is to be made. The apex will be directly above the centre of the base. Calculate the surface area of the glass. A cone is the general name ...

Scientists have discovered a "vast underground city" running beneath the famed Egyptian pyramids in Giza. Using radar equipment, they created high-resolution photos of thousands of feet below the surf ...

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