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The area of one side is 1/2 x 10 x 12 = 60 square inches.
There are 4 sides, so multiply the area of one side by 4:
60 x 4 = 240 square inches.
The area of the bottom is 12 x 12 = 144 square inches.
Total area = 144 + 240 = 384 square inches.