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alekssr [168]
3 years ago
12

How do you find surface area of a rectangle prism

Mathematics
2 answers:
anastassius [24]3 years ago
4 0
The formula to find it is 2(l x h + h x w + w x l) = SA in which l = length, h = height, and w = width. 

Hope this helps!
Svetllana [295]3 years ago
4 0
Hey there!

Surface area is comparable to area of a shape, like a rectangle or square, but it's for a rectangular prism, which is a 3D shape. Therefore, we have an entirely different formula. It gives us the sum of the areas of all the faces- so instead of finding one area for one shape, we find all the areas for a 3D shape (a rectangular prism is made of rectangles).

We use the formula:

2(lw + wh + lh)

So, if our length was 1, width was 2, and height was 3, we'd have:

2(1*2 + 2*3 + 1*3) =
2(2 + 6 + 3) =
2(8 + 3) =
2(11) =
22 units squared.

Hope this helps!
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