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To calculate the surface area of a box, find the area of each face, and add all answers together. For example, the surface area of a square whose faces are all 2" by 2" can be calculated with the following equation:

2x2x6

2x2 equals 4. Since a square's sides are all the same length, we can simply multiply 4 by the number of faces on a square(6), instead of 4+4+4+4+4+4. THIS IS ONLY TRUE FOR SQUARES! I REPEAT, THIS IS ONLY TRUE FOR SQUARES!!!! For all other shapes, the sides are NOT all the same length. So THIS IS ONLY TRUE FOR SQUARES!

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14y ago

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Q: How do you calculate the surface area of a box?
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