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anonymous

  • one year ago

Is one flag a translation image of the other, or rotation image? Explain. http://assets.openstudy.com/updates/attachments/55b931b0e4b0adef802b8fe6-lollygirl217-1438293958142-as.jpg My answer is: translation. each point in the image is shifted up (or down depending on point of view) the same amount from one to the other to find a center of rotation, you need to find the intersection of the perpendicular bisectors of the lines connecting the image to the preimage and those lines will all be parallel so there is no rotation. Is that a good enough for answer?

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  1. anonymous
    • one year ago
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    Another question: Describe the image of 'D' first reflected across line l & then across line m. http://assets.openstudy.com/updates/attachments/515c5dfae4b07077e0c1d60e-vt-1365007876700-d.png My answer: http://assets.openstudy.com/updates/attachments/515c5dfae4b07077e0c1d60e-vt-1365007876700-d.png Is that good enough? 3rd question:

  2. anonymous
    • one year ago
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    The dashed triangle is a dilation image of the solid triangle with the center at the origin. Is the dilation an enlargement or a reduction? Find the scale factor of the dilation. http://assets.openstudy.com/updates/attachments/55ba8e27e4b0aa1bfb5ce088-lollygirl217-1438303570754-as.jpg I actually am not sure on this one.

  3. anonymous
    • one year ago
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    @Loser66 @campbell_st

  4. anonymous
    • one year ago
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    @vera_ewing

  5. anonymous
    • one year ago
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    @EclipsedStar @KyanTheDoodle @mathway @triciaal @campbell_st @Loser66

  6. anonymous
    • one year ago
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    It's been literally over 6 hours.

  7. anonymous
    • one year ago
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    @pooja195

  8. anonymous
    • one year ago
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    @sammixboo

  9. anonymous
    • one year ago
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    @campbell_st

  10. anonymous
    • one year ago
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    helllllllllllloooooooooooooo??? I literally have spent all day trying to get help...

  11. anonymous
    • one year ago
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    @Australopithecus

  12. anonymous
    • one year ago
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    @abb0t

  13. Australopithecus
    • one year ago
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    Yeah that seems fine

  14. anonymous
    • one year ago
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    The first on is? You can't just be telling me that, TELL ME if there is something more. I have waited literally all day for this to be answered and I do not want any mistakes on my assignment!

  15. anonymous
    • one year ago
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    @iambatman

  16. anonymous
    • one year ago
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    I still cant believe i haven't gotten an answer...

  17. jtvatsim
    • one year ago
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    Are you still working on the second one? The dilation one?

  18. anonymous
    • one year ago
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    No. Is the first one good btw?

  19. jtvatsim
    • one year ago
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    Let me check.

  20. jtvatsim
    • one year ago
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    For the first one, is your answer that nothing changes? D returns to where it was before? It looks like you might have posted the same screenshot twice by accident...

  21. anonymous
    • one year ago
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    oh shoot hold on

  22. jtvatsim
    • one year ago
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    No worries

  23. anonymous
    • one year ago
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    This is my answer for number one. translation. each point in the image is shifted up (or down depending on point of view) the same amount from one to the other to find a center of rotation, you need to find the intersection of the perpendicular bisectors of the lines connecting the image to the preimage and those lines will all be parallel so there is no rotation. Is that a good enough for answer?

  24. jtvatsim
    • one year ago
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    OK, I'm sorry, I was thinking about the "D" question. I'll look at your original question. How many questions did you post on this thread?

  25. anonymous
    • one year ago
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    Just two

  26. anonymous
    • one year ago
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    The second one I messed up on though...

  27. jtvatsim
    • one year ago
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    OK, I like your answer for the first question (the flag images). I would probably have ignored explaining that it wasn't a rotation since that is sort of obvious from the diagram, but your explanation seems correct.

  28. anonymous
    • one year ago
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    2.) Describe the image of 'D' first reflected across line l & then across line m. my answer: the letter d inverts laterally after crossing the line 1, and it becomes normal when it again crosses line m. It goes inverted and normal like an on/off switch. Is that a good enough explanation

  29. jtvatsim
    • one year ago
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    Sorry, just juggling questions here. :)

  30. anonymous
    • one year ago
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    Oh. My bad.

  31. jtvatsim
    • one year ago
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    No worries, you were ignored for pretty much the whole day it seems, so I can appreciate that. :)

  32. jtvatsim
    • one year ago
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    Instead of saying "crossing" I would say "reflecting over" on each line part. I really like the on/off switch analogy. I guess you could say that the end result is basically the same as a translation right? We did all this crazy reflecting stuff, and the result was just a slide over to the right. :)

  33. anonymous
    • one year ago
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    Alright.

  34. anonymous
    • one year ago
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    I just want to make sure it has enough detail and everything.

  35. jtvatsim
    • one year ago
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    As long as an explanation is clear, accurate, and precise that should satisfy anyone. If your explanation convinces yourself, then you probably did a good job. You went above and beyond the lazy "because it is" explanation :P. lol

  36. anonymous
    • one year ago
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    True, lol. And the first one is good as well? Sorry if I missed you saying yes or no.

  37. jtvatsim
    • one year ago
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    The flag question? Yes it looked fine. I think I had said that I personally wouldn't have bothered to explain that it isn't a rotation because that seemed obvious from the diagram, but yes, it looked correct.

  38. jtvatsim
    • one year ago
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    How was the third question? The triangle one?

  39. anonymous
    • one year ago
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    Right. Sorry hold on for a quick second.

  40. jtvatsim
    • one year ago
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    No problem :)

  41. jtvatsim
    • one year ago
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    be right back, checking on another question :) just tag me on your reply

  42. anonymous
    • one year ago
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    K.

  43. anonymous
    • one year ago
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    Find the image vertices for a dilation with center (0,0) and a scale factor of 4.

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  44. anonymous
    • one year ago
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    Is it 16,-2?

  45. anonymous
    • one year ago
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    I am really not so sure on this.

  46. jtvatsim
    • one year ago
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    sorry, back, openstudy is lagging a bit on my internet.

  47. jtvatsim
    • one year ago
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    Mmm... not quite, they want you to find the coordinates for each of the four vertices. The graph isn't perfect, but I'm guessing we start with A(-3,1), B(4,-3), C(2,3), and D(-1,4). We will dilate these.

  48. anonymous
    • one year ago
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    Okay.

  49. jtvatsim
    • one year ago
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    So, since our scale factor is 4, we literally just have to multiply each coordinate by 4. It's that easy. So, A(-3,1) becomes (-12,4). And so on.

  50. anonymous
    • one year ago
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    Oh, that is pretty easy.

  51. anonymous
    • one year ago
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    So when you mean by multiply...you mean it would result in (-12,4) (-48,16)

  52. jtvatsim
    • one year ago
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    Good question. I suppose my sentence was a little misleading. What I mean is that we do this for EACH of the four coordinates: So, A(-3,1) becomes (-12,4) we are done with A. Then, B(4,-3) becomes (16, -12). we are done with B. Do this for C. Do this for D. Does that clarify a little?

  53. anonymous
    • one year ago
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    Yes, thank you : )

  54. jtvatsim
    • one year ago
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    You are welcome. :)

  55. anonymous
    • one year ago
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    Sorry again. But is that all after that?

  56. anonymous
    • one year ago
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    @jtvatsim

  57. jtvatsim
    • one year ago
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    Yep, just list the image vertices coordinates. If you want to look extra "mathy" We usually write the image coordinates with a little apostrophe above them so A(-3,1) is the preimage coordinate and A' (-12,4) is the image coordinate for example.

  58. anonymous
    • one year ago
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    Okay, thanks.

  59. anonymous
    • one year ago
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    I ended with saying vertices A' (-12,4) B'(16,-12) C'(4,12) D'(-4,16)

  60. jtvatsim
    • one year ago
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    Let's check.

  61. jtvatsim
    • one year ago
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    C' should be (8,12) if I'm not mistaken. Other than that looks good.

  62. anonymous
    • one year ago
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    ....Lol. How could I even- well its late. That is finally it. Thank you for all of the help~!

  63. jtvatsim
    • one year ago
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    You are welcome. You've been staring at the same problems for a while now... believe me, strange stuff happens when you do that. :) Have a good night!

  64. anonymous
    • one year ago
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