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LUCKY_DIMON [66]
4 years ago
13

What is the surface area of the rectangular prism?

Mathematics
1 answer:
algol [13]4 years ago
8 0

let me lie down this prism.

Check the picture below.

so the prism is really 6 rectangles stacked up to each other at the edges, so we can simply get the area of each rectangle and sum them up.

\bf \stackrel{rectangles}{\stackrel{\textit{top and bottom}}{2(3.5\cdot 9)}~~~~+~~~~\stackrel{\textit{left and right}}{2(9\cdot 5)}~~~~+~~~~\stackrel{\textit{front and back}}{2(3.5\cdot 5)}} \\\\\\ 63+90+35\implies 188

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