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DorelTibi

/Users/doreltibi/Desktop/Screen Shot 2012-12-31 at 1.17.06 PM.png

  • one year ago
  • one year ago

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  1. DorelTibi
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    • one year ago
  2. DorelTibi
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    help

    • one year ago
  3. DorelTibi
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    help

    • one year ago
  4. aacehm
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    |dw:1356989474509:dw| Does knowing that you can divide a parallellogram into a rectangle and two triangles help?

    • one year ago
  5. DorelTibi
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    not really

    • one year ago
  6. aacehm
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    |dw:1356989718574:dw| |dw:1356989750298:dw|

    • one year ago
  7. DorelTibi
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    I think its like this: 144+b^2=400 b^2=266 b=16.3

    • one year ago
  8. aacehm
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    yep, that's the height of the rectangle, and you just need to find the length and multiply.

    • one year ago
  9. DorelTibi
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    how do u find the length

    • one year ago
  10. DorelTibi
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    ?

    • one year ago
  11. DorelTibi
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    help

    • one year ago
  12. aacehm
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    well, think about it. If you cut that triangle off and put it back on, just on the other side, you're not changing the length at all

    • one year ago
  13. DorelTibi
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    so its twelve inches the length

    • one year ago
  14. aacehm
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    no, that's the length of the triangle you cut off. The length of the base of the parallelogram is the length.

    • one year ago
  15. DorelTibi
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    so the length is 20

    • one year ago
  16. aacehm
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    |dw:1356990749844:dw||dw:1356990808666:dw|

    • one year ago
  17. aacehm
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    see how that works?

    • one year ago
  18. DorelTibi
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    Im realy confused inorder to find the area i just have to multiply 20 and 16 and get 320

    • one year ago
  19. aacehm
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    area of a parallelogram is base times height. You correctly found the height, using the pythagorean theorem. Now, you need to figure out which one the base is. (It's the one perpendicular to the height, and it's not 20). I was giving you a picture so you could see why this particular formula works.

    • one year ago
  20. DorelTibi
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    is it 32

    • one year ago
  21. DorelTibi
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    @aacehm im i right

    • one year ago
  22. aacehm
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    yes, it's 32. I hope you understood how that worked.

    • one year ago
  23. DorelTibi
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    so the area would be 16*32

    • one year ago
  24. DorelTibi
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    yea?

    • one year ago
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