Answer:
207 m^2
Explanation:
The surface area of a pyramid with side length s and slant height h is ...
SA = s^2 + 2sh
SA = s(s +2h)
= (9 m)(9 m+ 2(7 m)) = (9 m)(23 m) = 207 m^2
The surface area of the model is 207 square meters.
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