For a box with equal dimensions on all sides, the surface area, S, is calculated as follows:
S = 6*a^2
where a is the length of the side of the box
For a box with different dimensions on the sides, the surface area, S, is calculated as follows:
S = 2*a*b + 2*a*c + 2*b*c
where a, b, c are the lengths of the different sides of the box
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The front surface of a box is a rectangle. If you only need the area of the front surface, then it doesn't even matter what it's part of. Multiply the width of the surface by its height. The answer is its area.
If it's just the front surface of a box then it's simply a 2D shape, the area can be calculated by multiplying the length by the width. Answer will be in units squared.
No. If you want the area of a single surface of a box, simply multiply the height by the width of the surface of interest.
multiply the height by the width
You measure the sides, and multiply the top and side.