What is the surface area of a square pyramid if the base has an area of 16 cm squared and the lateral faces have a slant height of 12 cm ?

The square base has area 16 cm², so its side length is 4 cm and its perimeter is 16 cm. The lateral area is ½ × perimeter × slant height = ½ × 16 × 12 = 96 cm²; adding the 16 cm² base gives a total surface area of 112 cm², choice A.

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