first find the area of the base. then multiply it by the height and divide it by three.
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first you find the area of the base and then you find the area one side of the pyramid an you time it with 3 if it is a triangular pyramid or 4 if it is a square pyramid
Find the surface area of each individual face and then add them together to give the total surface area of the pyramid.
you dont
Divide by the number of faces. For example, divide by 6 if it is a cube. Divide by 4 if it is a triangular pyramid.
Find th elateral area of a rectangular pyramid having height 9 , base lenght 6 and base width 7