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anonymous

  • one year ago

What is the area of an object with with 5cm, 7cm, 5cm, 12cm, 14cm, 12cm?

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  1. jim_thompson5910
    • one year ago
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    Can you draw the figure?

  2. anonymous
    • one year ago
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    |dw:1434496859928:dw| @jim_thompson5910

  3. jim_thompson5910
    • one year ago
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    thanks

  4. anonymous
    • one year ago
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    You are welcome

  5. jim_thompson5910
    • one year ago
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    there are a few ways to do it, but you can break the figure up like this |dw:1434497162507:dw|

  6. jim_thompson5910
    • one year ago
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    |dw:1434497192921:dw|

  7. mathstudent55
    • one year ago
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    There is info missing & info that is hard to understand.

  8. mathstudent55
    • one year ago
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    |dw:1434497071072:dw|

  9. mathstudent55
    • one year ago
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    |dw:1434497122546:dw|

  10. jim_thompson5910
    • one year ago
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    maybe that 7cm is the height shaded here? |dw:1434497310578:dw|

  11. jim_thompson5910
    • one year ago
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    yeah maybe?

  12. anonymous
    • one year ago
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    So the area should be 218

  13. mathstudent55
    • one year ago
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    @Ashleyistheboss2 Are the 7-cm sides on top as shown below? |dw:1434497290540:dw|

  14. anonymous
    • one year ago
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    no

  15. mathstudent55
    • one year ago
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    Then where is the 7-cm side? Like this? |dw:1434497500097:dw|

  16. anonymous
    • one year ago
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    yea

  17. mathstudent55
    • one year ago
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    Ok. One more question. What are the lengths of these two sides (in thick black lines)? |dw:1434497577599:dw|

  18. anonymous
    • one year ago
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    7cm

  19. mathstudent55
    • one year ago
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    |dw:1434497821659:dw|

  20. mathstudent55
    • one year ago
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    Then Jim was correct all along.

  21. jim_thompson5910
    • one year ago
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    so the picture actually looks like this |dw:1434497940789:dw|

  22. jim_thompson5910
    • one year ago
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    |dw:1434498035648:dw|

  23. jim_thompson5910
    • one year ago
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    |dw:1434498068378:dw|

  24. jim_thompson5910
    • one year ago
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    break the figure into 3 rectangles A,B,C |dw:1434498077327:dw|

  25. jim_thompson5910
    • one year ago
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    Rectangle A is a 12 by 5 rectangle Rectangle B is a 4 by 5 rectangle (see below) Rectangle C is a 5 by 12 rectangle |dw:1434498154050:dw|

  26. mathstudent55
    • one year ago
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    Another way of doing it is: |dw:1434502570594:dw|

  27. mathstudent55
    • one year ago
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    |dw:1434502643109:dw|

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