The surface area of a pyramid can be calculated by adding the area of the base to the sum of the areas of the triangular faces. ... Find the area of this square-based pyramid: Show answer Hide answer.

Total surface area = square base + 4 triangular sides Total surface area = 9 + (4 × 7.5) = 9 + 30 = 39 m 2 A cone is the general name of a shape that has a flat base of any shape tapering up to a ...