Question

The length of the base of a square pyramid is 9 inches. The slant height is 12 inches. What is the surface area of the pyramid? A) 189 in2 B) 225 in2 C) 297 in2 D) 360 in2

Answer 1

Answer:  C) 297 in2

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Surface area of a square pyramid (S) = 2 (length of the base) slant + length of the base ^2

S = 2bs + b^2

Replacing with the values given:

S = 2 (9) 12 + 9^2

S = 216 +81 = 297 square inches

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