SOLUTION: what is the surface area of a rectangle with a length of 3 centimeters and a width of 1 centimeters and a height of 2 centimeters

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Question 850341: what is the surface area of a rectangle with a length of 3 centimeters and a width of 1 centimeters and a height of 2 centimeters
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rectangles are 2D objects.
You mean a rectangular solid.
Here is the box unfolded.
Now each face is a rectangle and you can get the total surface area.

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Now each face is a rectangle and you can get the total surface area by just counting the number of blocks or by getting the area of each face.
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SA=1%2A2%2B2%2A3%2B1%2A3%2B2%2A3%2B1%2A3%2B1%2A2
SA=2%2B6%2B3%2B6%2B3%2B2
SA=22