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anonymous

  • one year ago

Determine whether the figures are similar. If so, determine the scale factor

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  1. anonymous
    • one year ago
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  2. myininaya
    • one year ago
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    |dw:1438909408931:dw|

  3. mathmate
    • one year ago
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    Hint: If the figures are similar, then the corresponding sides are in proportion, i.e. (longer side of image)/(longer side of preimage)=(shorter side of image)/(shorter side of preimage)=

  4. anonymous
    • one year ago
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    i got 2.33333 and 2.5

  5. myininaya
    • one year ago
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    if those aren't the same number then they aren't similar

  6. myininaya
    • one year ago
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    if those were the same number then they would be similar

  7. anonymous
    • one year ago
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    a. yes; scale factor = 2/5 b. yes; scale factor = 9/21 c. yes; scale factor = 3/7 d. no

  8. myininaya
    • one year ago
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    well we just said 2.3333 was not the same as 2.5

  9. anonymous
    • one year ago
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    d?

  10. myininaya
    • one year ago
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    yep! :)

  11. anonymous
    • one year ago
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    thankss

  12. myininaya
    • one year ago
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    np

  13. myininaya
    • one year ago
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    and I love the way @mathmate put it

  14. anonymous
    • one year ago
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    can you help me with a few more?

  15. myininaya
    • one year ago
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    i can try

  16. anonymous
    • one year ago
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    Quadrilateral WXYZ has the following vertices: W (2,3) X (1,1) Y (3,0) Z (5,2)

  17. anonymous
    • one year ago
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  18. myininaya
    • one year ago
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    Does the question say what it is looking for?

  19. myininaya
    • one year ago
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    Like are they looking for the object being reflected about some line?

  20. anonymous
    • one year ago
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    Select the correct graph of the figure & its image after a transformation 180 degrees about the origin.

  21. myininaya
    • one year ago
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    when you think 180 deg think a half turn let's look at just Z in the first picture... |dw:1438910171720:dw| does the angle formed here look like 180 deg?

  22. myininaya
    • one year ago
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    remember you should a straight line something like this: /, \, |, or _

  23. myininaya
    • one year ago
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    |dw:1438910341194:dw|

  24. myininaya
    • one year ago
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    do you see why?

  25. myininaya
    • one year ago
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    it has to be a line that is not a line it it didn't have that little pointy thing at the bottom we would be golden

  26. myininaya
    • one year ago
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    let's look at the second graph and you can tell me what you think I will graph just the Z points again

  27. myininaya
    • one year ago
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    |dw:1438910446622:dw| the third graph |dw:1438910583808:dw| last graph |dw:1438910636536:dw| which graph shows a straight line from Z to Z'?

  28. anonymous
    • one year ago
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    last one

  29. myininaya
    • one year ago
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    agreed! straight lines have 180 deg angles

  30. anonymous
    • one year ago
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    right!

  31. myininaya
    • one year ago
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    also a neat little trick if a point has been rotated 180deg about the origin the point (A,B) becomes (-A,-B)

  32. myininaya
    • one year ago
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    if you notice Z was (5,2) in that one pic and Z' was (-5,-2) in that one pic you chose

  33. anonymous
    • one year ago
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    okay, so the answer is z?

  34. myininaya
    • one year ago
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    the answer is the last picture or whatever choice this is http://assets.openstudy.com/updates/attachments/55c4007ee4b0f6bb86c3c83e-blueeyes13-1438909865901-44.jpg

  35. anonymous
    • one year ago
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    Thank you so much

  36. myininaya
    • one year ago
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    np

  37. myininaya
    • one year ago
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    have a good day @BlueEyes13 :)

  38. anonymous
    • one year ago
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    same to you :D

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