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Common sense. The area of a rectangle is the product of its two dimensions. A rectangular prism has a surface area combining six rectangles, two with each of the 3 combinations of dimensions.

Q: How did the person that made the formula 2lw x 2lh x 2wh put it together?

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(2lw)(2lh)(2wh) multiply all of those together. i mean, plug in the numbers for the variables and solve. * * * * * Not quite. The correct answer is 2lw + 2lh + 2wh you add the three terms together!

A= 2lw+2lh+2wh

The formula for the surface area of a rectangular solid is = 2lw + 2lh + 2wh 2(length x width)+2(length x height)+2(width x height)

You have to visualize the 3-D object. Think in your mind that this object has six sides. To find the surface area you need to add all of the areas of these sides together. In order to do that you need this formula... S.A. = 2(L*H) + 2(L*W) + 2(H*W) L=length H=height W=width Go to the related link below for a good representation

SA = 2lw+2lh+2wh

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2lw + 2lh + 2wh

(2lw)(2lh)(2wh) multiply all of those together. i mean, plug in the numbers for the variables and solve. * * * * * Not quite. The correct answer is 2lw + 2lh + 2wh you add the three terms together!

2LW +2LH + 2WH L=length H= height W= width

A = 2lw + 2lh + 2wh so A - 2lw = 2lh + 2wh = 2h(l+w) = h*2(l+w) so h = 1/2*(A-2lw)/(l+w)

surface area of a rectangular prism is the formula: 2lw+2wh+2lh

sa=2lw+2lh+2wh

A= 2lw+2lh+2wh

The formula for the surface area of a rectangular solid is = 2lw + 2lh + 2wh 2(length x width)+2(length x height)+2(width x height)

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You have to visualize the 3-D object. Think in your mind that this object has six sides. To find the surface area you need to add all of the areas of these sides together. In order to do that you need this formula... S.A. = 2(L*H) + 2(L*W) + 2(H*W) L=length H=height W=width Go to the related link below for a good representation

1/3 bh x h divided by 2 It depends on the dimensios of the cuboid (rectangular prism). If it has edge lengths a,b and c then it is made of three pairs of rectangles of area ab, ac and bc. So suface area = 2(ab + bc + ca)