The area of a triangle can be calculated through the equation, A = bh / 2 where A is area, b is base, and h is height. Substituting the known values from the given above to the equation A = (14 in)(6 in) / 2 = 42 in² Since, there are five of these triangles, the total area is, total area = 5(42 in²) = 210 in² Thus, the total area of the plywood needed is 210 in².