Save guides, add subjects and pick up where you left off with your BBC account. The surface area of a pyramid can be calculated by adding the area of the base to the sum of the areas of the ...

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 ...