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luisz

Gina wrote the following paragraph to prove that the segment joining the midpoints of two sides of a triangle is parallel to the third side. Given: ∆ABC Prove: The midsegment between sides Line segment AB and Line segment BC is parallel to side Line segment AC. Draw ∆ABC on the coordinate plane with point A at the origin (0, 0). Let point B have the ordered pair (x1, y1) and locate point C on the x-axis at (x2, 0). Label point D as the midpoint of Line segment AB with coordinates at Ordered pair the quantity 0 plus x sub 1, divided by 2; the quantity 0 plus y sub 1, divided by 2 by th

  • one year ago
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  1. luisz
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    eh

    • one year ago
  2. luisz
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    hold on

    • one year ago
  3. luisz
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    Gina wrote the following paragraph to prove that the segment joining the midpoints of two sides of a triangle is parallel to the third side. Given: ∆ABC Prove: The midsegment between sides Line segment AB and Line segment BC is parallel to side Line segment AC. Draw ∆ABC on the coordinate plane with point A at the origin (0, 0). Let point B have the ordered pair (x1, y1) and locate point C on the x-axis at (x2, 0). Label point D as the midpoint of Line segment AB with coordinates at Ordered pair the quantity 0 plus x sub 1, divided by 2; the quantity 0 plus y sub 1, divided by 2 by the Midpoint Formula. Label point E so it is the midpoint of Line segment BC with an ordered pair of Ordered pair the quantity of x sub 1 plus x sub 2 divided by 2; the quantity of 0 plus y sub 1 divided by 2 by the Midpoint Formula. The slope of Line segment DE is found to be 0 through the application of the slope formula: The difference of y sub 2 and y sub 1, divided by the difference of x sub 2 and x sub 1 is equal to the difference of the quantity 0 plus y sub 1, divided by 2, and the quantity 0 plus y sub 1, divided by 2, divided by the difference of the quantity x sub 1 plus x sub 2, divided by 2 and the quantity 0 plus x sub 1, divided by 2 is equal to 0 divided by the quantity x sub 2 divided by 2 is equal to 0 When the slope formula is applied to Line segment AC the difference between y sub 2 and y sub 1, divided by the difference of x sub 2 and x sub 1 is equal to the difference of 0 and 0, divided by the difference of x sub 2 and 0 is equal to 0 divided by x sub 2 is equal to 0, its slope is also 0. Since the slope of Line segment DE and Line segment AC are identical, Line segment DE and Line segment AC are parallel by the definition of parallel lines.

    • one year ago
  4. luisz
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    does that help at all?

    • one year ago
  5. luisz
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    http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/1001/1001_G4_Q12b.gif

    • one year ago
  6. luisz
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    hold up

    • one year ago
  7. luisz
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    • one year ago
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  8. luisz
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    • one year ago
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  9. luisz
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    • one year ago
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  10. luisz
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    • one year ago
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  11. luisz
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    helps any?

    • one year ago
  12. luisz
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    you guys there?

    • one year ago
  13. luisz
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    oh....

    • one year ago
  14. luisz
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    forgot

    • one year ago
  15. luisz
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    here are the answer choices...

    • one year ago
  16. luisz
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    What is the flaw in Gina’s proof? Points D and E must be constructed, not simply labeled, as midpoints. Segments DE and AC are parallel by construction. The slope of segments DE and AC is not 0. The coordinates of D and E were found using the Distance between Two Points Postulate

    • one year ago
  17. KingGeorge
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    Is it this question? http://assets.openstudy.com/updates/attachments/4fe3df92e4b06e92b872936f-yourmom14-1340333980899-georgeiiieiehjkdhkjs.jpg

    • one year ago
  18. luisz
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    where did you find that?

    • one year ago
  19. KingGeorge
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    It was a question I answered two days ago.

    • one year ago
  20. luisz
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    Did you find it on FLVS online?

    • one year ago
  21. luisz
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    I am a Florida Virtual School Student

    • one year ago
  22. luisz
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    so

    • one year ago
  23. luisz
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    can you help me out here?

    • one year ago
  24. KingGeorge
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    First off, which choices can we easily eliminate?

    • one year ago
  25. luisz
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    Choice three is erroneous

    • one year ago
  26. luisz
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    AC is 0

    • one year ago
  27. KingGeorge
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    Right, any others you can see are obviously wrong?

    • one year ago
  28. luisz
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    and the distance formula was never used, so we can eliminate 4

    • one year ago
  29. luisz
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    But there was a flaw in her work

    • one year ago
  30. luisz
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    I have a feeling that her flaw was in choice 1

    • one year ago
  31. KingGeorge
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    Right again. Now it's up to 1 or 2. Let's look at 1. Did Gina construct D and E, or did she label them?

    • one year ago
  32. luisz
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    Points D and E must be constructed, not simply labeled, as midpoints.

    • one year ago
  33. luisz
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    hmm

    • one year ago
  34. luisz
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    She only labeled them

    • one year ago
  35. luisz
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    she did not construct them

    • one year ago
  36. KingGeorge
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    Right. So the flaw is that she labeled them

    • one year ago
  37. luisz
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    k

    • one year ago
  38. luisz
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    by browser logged off automatically without my permission :(

    • one year ago
  39. luisz
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    i lost my answers

    • one year ago
  40. luisz
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    hold on

    • one year ago
  41. luisz
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    wait!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    • one year ago
  42. luisz
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    ;D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    • one year ago
  43. luisz
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    :D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    • one year ago
  44. luisz
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    I didn't lose them!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    • one year ago
  45. luisz
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    k!!!!!!!!!!!!!!!!

    • one year ago
  46. luisz
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    two more nasty suckers coming up

    • one year ago
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