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  1. Hayleymeyer
    • one year ago
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    |dw:1433950053698:dw|

  2. Hayleymeyer
    • one year ago
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    each square is 5. find the surface area, ive been doing this for 3 hours, on this type of stuff.

  3. Hayleymeyer
    • one year ago
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    @danicap

  4. geerky42
    • one year ago
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    OK you gotta have to count squares. But you got to do it in smart way. OK clearly this is 3D. But imagine looking it at certain angle (front, top, and side), so it would looks like 2D Then there will be SAME number of square on opposite sides of whatever you are "looking" at. Get the plan?

  5. Hayleymeyer
    • one year ago
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    got it!

  6. geerky42
    • one year ago
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    For example, if you are looking at top, you will kind of see this: |dw:1433950339164:dw|

  7. geerky42
    • one year ago
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    then multiply that by 2, for other side (bottom)

  8. Hayleymeyer
    • one year ago
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    which would be 16?

  9. geerky42
    • one year ago
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    Yes there are 16 squares for TOP and BOTTOM. Now count front.

  10. Hayleymeyer
    • one year ago
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    16 for the front

  11. geerky42
    • one year ago
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    you would see this:|dw:1433950434314:dw|

  12. geerky42
    • one year ago
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    yeah 16. so double that for other sides and you have 32

  13. geerky42
    • one year ago
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    Ok now side.

  14. Hayleymeyer
    • one year ago
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    14?

  15. geerky42
    • one year ago
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    I got 12

  16. Hayleymeyer
    • one year ago
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    my bad! counted 2 extra block

  17. geerky42
    • one year ago
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    |dw:1433950631697:dw|

  18. geerky42
    • one year ago
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    OK now double that. 24

  19. geerky42
    • one year ago
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    Now add them all together: 24 + 32 + 16 = ?

  20. Hayleymeyer
    • one year ago
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    72

  21. geerky42
    • one year ago
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    Yep. So there are 72 squares. Now for each square, what is area?

  22. geerky42
    • one year ago
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    5 mm * 5 mm = ?

  23. Hayleymeyer
    • one year ago
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    10mm^2

  24. geerky42
    • one year ago
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    No. multiply 5 by 5. What do you get?

  25. geerky42
    • one year ago
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    A = lw

  26. Hayleymeyer
    • one year ago
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    5/5=1

  27. Hayleymeyer
    • one year ago
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    im a very slow learner, sorry :(

  28. geerky42
    • one year ago
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    To get area, you just multiply length by width, right?

  29. Hayleymeyer
    • one year ago
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    yes

  30. geerky42
    • one year ago
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    OK, so length of square is 5 and width is also 5

  31. geerky42
    • one year ago
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    So you have \(Area = 5\times5\)

  32. Hayleymeyer
    • one year ago
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    okay, which would be 25

  33. geerky42
    • one year ago
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    Yeah Area of EACH square is 25. And there are 72 squares. So multiply 72 by 25. That would be your surface area.

  34. Hayleymeyer
    • one year ago
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    which would be 1,875

  35. geerky42
    • one year ago
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    I got 1800?

  36. geerky42
    • one year ago
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    \(72\times25\)

  37. Hayleymeyer
    • one year ago
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    my bad, I don't no why my calculator is messing up

  38. geerky42
    • one year ago
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    OK, so you got 1800, right? So your surfacce area is\[SA = \boxed{1800~\text{mm}^2}\]

  39. geerky42
    • one year ago
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    IS that clear?

  40. geerky42
    • one year ago
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    Just got to count the smart way, kinda.

  41. Hayleymeyer
    • one year ago
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    thanks so much, I appreciate and thanks for your patience!

  42. geerky42
    • one year ago
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    No problem

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