well at the bottom there is proberly two round spheres so what you do is you is times the spheres by the area of the pyramids base to find out how big it is.
^^this guy is trolling
where is there a sphere in a pyramid
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The surface area of a pyramid is the area of all the faces of the pyramid, for a pyramid with apex in the centre and a regular polygon as its base, (the bottom of a pyramid is the base, it is regular if all sides are the same length) the surface area is: B + 1/2(P * H) where B is the area of the base, P is the perimeter (area around) the base and H is the height of the pyramid.
you do stuff
we can find the height of a rectangular pyramids located at the top of the base
legnthXwidthXheight Top is close, but only for a rectangular prism :(... It is actually (base area) X height. For pyramids, it is 1/3(base area) X height.
Area = Base * Height so Base = Area/Height