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juciystar234

  • 2 years ago

The sheet of plywood at the right has a piece cut from one corner.What is the area of the plywood?

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  1. juciystar234
    • 2 years ago
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    |dw:1347408268242:dw|

  2. jiji501
    • 2 years ago
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    The area of the whole rectangle is 4 x8 = 32 You can now split up your shape into two rectangles. 8 x 2= 16 5 x 4 = 20 20+16 = 36 This makes no sense.

  3. juciystar234
    • 2 years ago
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    That is the closest I could draw

  4. juciystar234
    • 2 years ago
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    Haha ok

  5. juciystar234
    • 2 years ago
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    Let me try and work it out

  6. asnaseer
    • 2 years ago
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    work out the area of a large outer rectangle then subtract from this the area of the rectangle in the top right corner

  7. asnaseer
    • 2 years ago
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    you will need to work these out first: |dw:1347408608107:dw|

  8. juciystar234
    • 2 years ago
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    Ok im working it out

  9. juciystar234
    • 2 years ago
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    So isn't the piece missing a 2 by 3?

  10. asnaseer
    • 2 years ago
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    yes :)

  11. juciystar234
    • 2 years ago
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    Ok so now what so I do?

  12. asnaseer
    • 2 years ago
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    what is the area of the piece that was cut out?

  13. juciystar234
    • 2 years ago
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    6

  14. juciystar234
    • 2 years ago
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    6ft. I mean

  15. asnaseer
    • 2 years ago
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    correct - 6 ft^2 now subtract 6 from the area of the original whole rectangle

  16. juciystar234
    • 2 years ago
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    would it be 64 - 6 = 58?

  17. asnaseer
    • 2 years ago
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    where did you get 64 from?

  18. juciystar234
    • 2 years ago
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    because 4x8 twice from before you cut out that piece of plywood

  19. asnaseer
    • 2 years ago
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    why "twice"?

  20. juciystar234
    • 2 years ago
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    |dw:1347408897668:dw|

  21. juciystar234
    • 2 years ago
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    Or is it just multiplied once

  22. juciystar234
    • 2 years ago
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    like 4x8 once - 6

  23. asnaseer
    • 2 years ago
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    what is the area of a rectangle with length L and width W?

  24. juciystar234
    • 2 years ago
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    Before you cut out the piece?

  25. asnaseer
    • 2 years ago
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    I think you may be getting confused with the perimeter of a rectangle which is the total distance all around it.

  26. juciystar234
    • 2 years ago
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    Yeah maybe.. :P

  27. asnaseer
    • 2 years ago
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    Area of rectangle of length L and width W = L * W Perimeter of rectangle of length L and width W = 2(L + W)

  28. juciystar234
    • 2 years ago
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    So then 80?

  29. juciystar234
    • 2 years ago
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    Yeah I forgot how to do this from last year.... :P

  30. juciystar234
    • 2 years ago
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    But I think I'm catching on! :)

  31. asnaseer
    • 2 years ago
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    so, with the extra acquired knowledge, what will be the original rectangles area (before the piece was cut out)?

  32. juciystar234
    • 2 years ago
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    80?

  33. asnaseer
    • 2 years ago
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    are you sure - look again and what we said above...

  34. juciystar234
    • 2 years ago
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    ok

  35. asnaseer
    • 2 years ago
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    what is the length and width of the original rectangle?

  36. juciystar234
    • 2 years ago
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    So wasnt it 8x8=64 4x4=16 64+16=80?

  37. asnaseer
    • 2 years ago
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    |dw:1347409394610:dw|

  38. juciystar234
    • 2 years ago
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    OHHHHHHHHHHHHHHHH!!! OK!! :D Sooo 32?

  39. asnaseer
    • 2 years ago
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    :) that is correct

  40. asnaseer
    • 2 years ago
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    now just subtract from this the area of the piece that was cut out

  41. juciystar234
    • 2 years ago
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    so? 26?

  42. asnaseer
    • 2 years ago
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    peeeeeerrrrfect!

  43. juciystar234
    • 2 years ago
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    Yahooo!!!!

  44. asnaseer
    • 2 years ago
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    I'm sure with some practice you'll become a maths wizard very soon

  45. juciystar234
    • 2 years ago
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    Im in honors im liike 2 grades ahead!!

  46. asnaseer
    • 2 years ago
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    that is fantastic - keep up the good work my friend :)

  47. juciystar234
    • 2 years ago
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    Thankx you 2

  48. asnaseer
    • 2 years ago
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    yw :)

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