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anonymous

  • one year ago

Pre algebra questions <~< ~Is actually trying and needs help~

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  1. anonymous
    • one year ago
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    Triangle PQR is transformed to triangle P'Q'R'. Triangle PQR has vertices P(3, −6), Q(0, 9), and R(−3, 0). Triangle P'Q'R' has vertices P'(1, −2), Q'(0, 3), and R'(−1, 0). Plot triangles PQR and P'Q'R' on your own coordinate grid. Part A: What is the scale factor of the dilation that transforms triangle PQR to triangle P'Q'R'? Explain your answer. (4 points) Part B: Write the coordinates of triangle P"Q"R" obtained after P'Q'R' is reflected about the y-axis. (4 points) Part C: Are the two triangles PQR and P''Q''R'' congruent? Explain your answer. Part c: They must be similar but because of dilation they cant be congruent.

  2. anonymous
    • one year ago
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    Part B: NO IDEA. Part A: I really don't know what they're asking here o-o

  3. Loser66
    • one year ago
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    |dw:1444602056939:dw|

  4. Loser66
    • one year ago
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    |dw:1444602255247:dw|

  5. anonymous
    • one year ago
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    I can't see the rest of the word omo

  6. Loser66
    • one year ago
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    You can see the scale is 1/3, since Q (0,9) goes to Q' (0,3) P (3,-6) goes to P' (1,-2) |dw:1444602422134:dw|

  7. Loser66
    • one year ago
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    same as R (-3,0) goes to R' (-1,0) 1/3 R = R'

  8. Loser66
    • one year ago
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    for B, just change the x-coordinate of the points from positive to negative. like P' ( 1,-2), after reflecting about y axis, it becomes (-1,-2) . That is it. Do the same with Q', R'

  9. Loser66
    • one year ago
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    for C, they are congruent.

  10. anonymous
    • one year ago
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    B: Q'= (0,3) R'= (-1, 0) P'= (-1, -2) < making sure I got that right.

  11. Loser66
    • one year ago
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    |dw:1444602858155:dw|

  12. anonymous
    • one year ago
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    Ohhh so everything is opposite

  13. Loser66
    • one year ago
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    |dw:1444602881824:dw|

  14. Loser66
    • one year ago
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    just x-coordinate, not y

  15. Loser66
    • one year ago
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    |dw:1444602937126:dw|

  16. Loser66
    • one year ago
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    |dw:1444602959886:dw|

  17. Loser66
    • one year ago
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    |dw:1444602984942:dw|

  18. Loser66
    • one year ago
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    |dw:1444603008578:dw|

  19. anonymous
    • one year ago
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    because 0 is a positive and a negative ( aka it can't be negative.)

  20. Loser66
    • one year ago
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    ok

  21. anonymous
    • one year ago
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    Part A: 1/3 Q (0,9) goes to Q' (0,3) P (3,-6) goes to P' (1,-2) Part B: r' = (1,0) P'= (-1, -2) Q'= (0,3) Part C: They are congruent. <checking if it's ok to move on to the next question>

  22. Loser66
    • one year ago
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    answer for a ) is " the scale of dilation is 1/3"

  23. anonymous
    • one year ago
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    Ok xD

  24. anonymous
    • one year ago
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    It says to explain why they're congruent, I thought congruent meant same shape and same size that's why your answer is confusing me.

  25. Loser66
    • one year ago
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    One of the theorem of congruence is SSS, right? your triangle P'Q' R' after rotating about y axis, its sides do not change its length. right? You fold a triangle by a paper, then you rotate it, or move it to other place, its sides stay, right? the triangle is itself still., right?

  26. anonymous
    • one year ago
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    Ohhh ok

  27. anonymous
    • one year ago
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    I have one more question if you wouldn't mind?

  28. Loser66
    • one year ago
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    have to see it first/

  29. anonymous
    • one year ago
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