To find the surface area of the textbook, we need to calculate the areas of each of its six faces and then add them together.
The textbook has two faces that measure 2 in. × 14 in., which gives a total area of 2 × 14 = 28 square inches.
It also has two faces that measure 2 in. × 9 in., which gives a total area of 2 × 9 = 18 square inches.
Lastly, it has two faces that measure 14 in. × 9 in., which gives a total area of 14 × 9 = 126 square inches.
Adding up all these areas, the total surface area of the textbook is 28 + 18 + 126 = <<28+18+126=172>>172 square inches.
Find the surface area of a textbook that is 2 in. × 14 in. × 9 in.
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