Respuesta :

The formula for the surface area S of a square pyramid with side length s and slant height h is
.. S = s(s +2h)

Your pyramid will have area
.. S = (18 in)*(18 in +2*16 in)
.. S = (18 in)*(50 in)
.. S = 900 in²

Answer:

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Step-by-step explanation:

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