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anonymous

  • one year ago

composite figures

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    need help!!!!

  3. anonymous
    • one year ago
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    think of it like a rectangular prism. the surface area formula is "2ab + 2bc + 2ac" http://www.math.com/tables/geometry/surfareas.htm

  4. anonymous
    • one year ago
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    is it 2400?

  5. anonymous
    • one year ago
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    is that right?

  6. anonymous
    • one year ago
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    try again. the width would be "a", the length would be "b", and the height would be "c". try adding up all of the "5"s and using that for the height. then use "12" for the length, and "10" for the width

  7. geerky42
    • one year ago
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    "Find the surface area of the \(\small \textbf{VISIBLE}\) sides of the boxes" |dw:1435203341959:dw| Just add up the area of these three rectangles.

  8. anonymous
    • one year ago
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    ohhh you're so right! I thought by "visible sides" it meant not to consider the sides of the boxes that would be facing each other when stacked. "geerky42" explained it so well and precise. thank you.

  9. geerky42
    • one year ago
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    Base is not included, so you only need to calculate these two rectangles.

  10. geerky42
    • one year ago
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    |dw:1435203679087:dw|

  11. geerky42
    • one year ago
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    Can you do that? @hinarauf80

  12. geerky42
    • one year ago
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    It's just \(12\times20 ~+~10\times20\)

  13. anonymous
    • one year ago
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    sorry i couldnt repond i have a baby she on the floor anyway thanks

  14. anonymous
    • one year ago
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    i mean sitting on the floor*

  15. anonymous
    • one year ago
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    its 240+200= 440

  16. anonymous
    • one year ago
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    but its wrong

  17. geerky42
    • one year ago
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    It's not our fault (nor your) that question is ambiguous... Try to add area of third rectangle.

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