I need help with math: I have to find the surface area of a rectangular box that has the numbers 2,5, and 8...
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I need help with math: I have to find the surface area of a rectangular box that has the numbers 2,5, and 8...

[From: ] [author: ] [Date: 11-08-14] [Hit: ]
!-The surface area of a rectangular prism is the area of the six rectangles that cover it. But we dont have to figure out all six because we know that the top and bottom are the same, the front and back are the same, and the left and right sides are the same.Just figure out the surface area for three different faces (Length times Width),......
HELP!!! It is due in two days, please, please, please!!!!!

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"The surface area of a rectangular prism is the area of the six rectangles that cover it. But we don't have to figure out all six because we know that the top and bottom are the same, the front and back are the same, and the left and right sides are the same. "

Just figure out the surface area for three different faces (Length times Width), then multiply each by two, then add them all together.

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Surface Area of a rectangle is 2(WL+LH+WH)
W-width
L-Length
H-Height
SA=2[(2*5)+(2*8)+(5*8)]
=2[(10)+(16)+(40)]
=2(66)
=132

I hope this helps.

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Can you label the length the width and the height?
1
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