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18 January, 13:43

The net below can be folded to form a square pyramid.

A square pyramid. The square base has side lengths of 9 inches. The triangular sides have a height of 6.1 inches and side length of 7.6 inches.

What is the surface area of the pyramid?

190.8 square inches

217.8 square inches

300.6 square inches

354.6 square inches

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Answers (2)
  1. 18 January, 14:08
    0
    190.8 square inches

    Step-by-step explanation:

    The area of one of its triangular sides is given by A = bh/2 were b = base = 9 inches and h = perpendicular height = 6.1 inches.

    A = bh/2. Since we have 4 triangular sides, the total area of its sides A₁ = 4A = 4bh/2 = 2bh = 2 * 9 * 6.1 = 109.8 square inches.

    The area of is base is the area of a square = 9² = 81 square inches.

    So te total surface area is 109.8 square inches + 81 square inches = 190.8 square inches
  2. 18 January, 14:09
    0
    190.8
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