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Area of Trapezium:, A= Sum of parallel sides Perpendicular distance, between the two parallel sides., , A= (a+b) Perpendicular distance, , Area of general quadrilaterals:, Area of quadrilateral ABCD = (h; + h2) d, , Surface area and volume of different 3D- figures:, Cuboid:, Total surface area of a cuboid = 2 (lb + bh + Lh), Where, (= length, 6 = breadth, h= height, , The lateral surface area of a cuboid = 2h(/+ 6), , Volume of a cuboid = lbh, , Cuboid:Total surface area of a cube = 2, The lateral surface area of acube = 2, , Volume of a cube = 2