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Mathematics 21 Online
OpenStudy (anonymous):

Find the surface area of the figure below. A. 256 B. 128 C. 408 D. 315

OpenStudy (anonymous):

OpenStudy (anonymous):

you would need to add the areas of all 6 faces

OpenStudy (anonymous):

every face is a rectangle

OpenStudy (anonymous):

wouldnt the answer be b?

OpenStudy (anonymous):

looks like its A

OpenStudy (anonymous):

remember there's two of each sides so once you find one side double it

OpenStudy (anonymous):

so essentially you need to find area of 3 sides whose lengths are different and double each and add all

OpenStudy (anonymous):

do it like this A= 2(wh + lw + lh)

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