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anonymous

  • one year ago

If rectangle ABCD was reflected over the y-axis, reflected over the x-axis, and rotated 180°, where would point A' lie? [Hint: Place your coordinates in the blank with no parentheses and a space after the comma in the form: x, y]

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    @ganeshie8 @welshfella @mathway help pleaase

  3. welshfella
    • one year ago
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    |dw:1439835853469:dw|

  4. welshfella
    • one year ago
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    the x is the point A what is the coordinates of the point after secodn reflection?

  5. welshfella
    • one year ago
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    |dw:1439836017204:dw|

  6. anonymous
    • one year ago
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    4, -2? im not sure

  7. welshfella
    • one year ago
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    No it starts at (1,-1)

  8. welshfella
    • one year ago
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    on the first refection it goes to (-1,-1) so after the second what is the coordinates

  9. anonymous
    • one year ago
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    i cant really tell the numbers, im not good at this

  10. welshfella
    • one year ago
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    well the numbers are bound to be 1's but one of them would be negative. Imagine the x axis is a mirror The point A' will be as far behind the mirror as A is in front of it

  11. welshfella
    • one year ago
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    |dw:1439836344324:dw|

  12. anonymous
    • one year ago
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    Sorry, What does it say on top of poit?

  13. anonymous
    • one year ago
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    point*

  14. welshfella
    • one year ago
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    can you see that the x coordinate is negative and the y coordinate is positive?

  15. welshfella
    • one year ago
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    This point

  16. anonymous
    • one year ago
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    Yes i could see that

  17. welshfella
    • one year ago
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    so what are the coordinates

  18. welshfella
    • one year ago
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    (x, y) = ?

  19. welshfella
    • one year ago
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    |dw:1439836567432:dw|

  20. anonymous
    • one year ago
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    4, -1 ?

  21. anonymous
    • one year ago
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    i dont know why i keep getting 4

  22. welshfella
    • one year ago
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    why 4?? 4 is here:- |dw:1439836657286:dw|

  23. welshfella
    • one year ago
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    what does A; line up with ?

  24. welshfella
    • one year ago
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    |dw:1439836711301:dw|

  25. anonymous
    • one year ago
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    -1 and 2?

  26. anonymous
    • one year ago
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    omg im so dumb

  27. welshfella
    • one year ago
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    the x coordinate is -1 A' lines up with this Now the y coordinate to its right is 1 so A1 has coordinates (-1,1) The x coordinate comes first then the y coordinate

  28. anonymous
    • one year ago
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    ohhh i get it now

  29. welshfella
    • one year ago
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    * A' not A1

  30. welshfella
    • one year ago
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    good

  31. welshfella
    • one year ago
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    Now the rotation through 180 degrees is easy |dw:1439836993317:dw|

  32. anonymous
    • one year ago
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    is that an x below 180?

  33. welshfella
    • one year ago
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    it returns to its original position

  34. welshfella
    • one year ago
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    now - my bad drawing - its an arrow showing the direction of rotation

  35. welshfella
    • one year ago
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    It starts at (1,-1) and ends at ( 1, -1)

  36. anonymous
    • one year ago
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    i got the arrow part

  37. welshfella
    • one year ago
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    the origin where the axes cross at (0,0) is the point about which the point rotates.

  38. welshfella
    • one year ago
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    |dw:1439837415204:dw|

  39. anonymous
    • one year ago
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    So it starts at (0,0) ?

  40. welshfella
    • one year ago
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    no it rotates about (0,0). It starts at (-1,1) and ends at (1,-1)

  41. welshfella
    • one year ago
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    |dw:1439837566493:dw|

  42. anonymous
    • one year ago
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    Ohhh makes sense now

  43. welshfella
    • one year ago
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    gtg

  44. anonymous
    • one year ago
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    thanks for the help.

  45. welshfella
    • one year ago
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    yw

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