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Area is always given in square units. Surface area is just a type of area where you look at the sides of a surface. To see why area is give in square units, look at the square. If you have a square that is 2 inches in every dicrection, you find it area by multiply the height by the length. This is 2ftx2ft. The 2x2 becomes 4 and the ftxft becomes square feet. The idea is similar for any area.

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15y ago

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