A X A r. In both 1 and 2 you then give dimensions H W and L without defining them. SA 54 cm2 54 cm2 225 cm2 300 cm2 375 cm2 954 cm2.
Here is how to derive the surface area of a square pyramid.
The surface area formula for a rectangular box is 2 x height x width width x length height x length as seen in the figure below. A 6 l² where l is a square side Surface area of a pyramid A pyramid is a 3D solid with a polygonal base and triangular lateral faces. Because both the length and width of a square are equal the area of a square is a 2 where a is the length of a side. The formula for the area of a square is side2 as seen in the figure below.