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anonymous

  • one year ago

Could someone help me with a few questions?

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  1. anonymous
    • one year ago
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    They're geometry, and it's over dilation.

  2. horsegirl27
    • one year ago
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    I know a little geometry, so I'll see if I can. If not, I'll tag some users to help. (also just one question per post please) :)

  3. anonymous
    • one year ago
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    Alright. First one. In ΔABC, ∠ ABC is a right angle included between AB¯¯¯¯¯ = 3 units and BC¯¯¯¯¯ = 2 units. ΔABC is dilated by a scale factor of 0.5 with point B as the center of dilation, resulting in the image ΔA′B′C′. Which statement about A'B¯¯¯¯¯¯ is true? A) A'B¯¯¯¯¯¯ is 1.5 units long and lies on the same line as AB¯¯¯¯¯. B) A'B¯¯¯¯¯¯ is 3 units long and lies on the same line as AB¯¯¯¯¯. C) A'B¯¯¯¯¯¯ is 1.5 units long but lies on a different line than AB¯¯¯¯¯. D) A'B¯¯¯¯¯¯ is 3 units long but lies on a different line than AB¯¯¯¯¯.

  4. horsegirl27
    • one year ago
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    So I'm not too sure, but I think it will be A or C. @mathmate do you know?

  5. horsegirl27
    • one year ago
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    @mathslover

  6. dan815
    • one year ago
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    You can't just give out answers

  7. anonymous
    • one year ago
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    I don't entirely understand...

  8. dan815
    • one year ago
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    |dw:1434729674449:dw|

  9. dan815
    • one year ago
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    center is the center of dialation

  10. dan815
    • one year ago
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    and all the sides have been halved as you multiplied by 0.5

  11. anonymous
    • one year ago
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    Okay.

  12. dan815
    • one year ago
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    B* is the center of dialation

  13. anonymous
    • one year ago
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    Alright.

  14. dan815
    • one year ago
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    so what do u think the answer is

  15. anonymous
    • one year ago
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    I really don't know. Geometry is my worst subject.

  16. anonymous
    • one year ago
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    Is it A?

  17. dan815
    • one year ago
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    yeah

  18. anonymous
    • one year ago
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    I have more, if you're okay with helping out.

  19. anonymous
    • one year ago
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    Polygon XYZW is dilated by a scale factor of 2 with point T as the center of dilation, resulting in the image X′Y′Z′W′. If point T lies on YZ¯¯¯¯¯, what can be said about Y'Z'¯¯¯¯¯¯¯ ? A) Y'Z'¯¯¯¯¯¯¯ passes through point T but has a different slope than YZ¯¯¯¯¯. B) Y'Z'¯¯¯¯¯¯¯ passes through point T and has the same slope as YZ¯¯¯¯¯ . C) Y'Z'¯¯¯¯¯¯¯ does not pass through point T but has the same slope as YZ¯¯¯¯¯. D) Y'Z'¯¯¯¯¯¯¯ does not pass through point T and has a different slope than YZ¯¯¯¯¯.

  20. dan815
    • one year ago
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    |dw:1434730481115:dw|

  21. dan815
    • one year ago
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    lets say T is some arbitrary point on that line YZ, now we dilate this figure by a factor of 2 about that point, what will that looks like

  22. anonymous
    • one year ago
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    .. B? I am terrible at this stuff.

  23. dan815
    • one year ago
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    |dw:1434730837347:dw|

  24. dan815
    • one year ago
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    you are right, i think

  25. anonymous
    • one year ago
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    Alright, next then. JK¯¯¯¯¯ is dilated by a scale factor of n with the origin as the center of dilation, resulting in the image J'K'¯¯¯¯¯¯¯. The slope of JK¯¯¯¯¯ is m. If the length of JK¯¯¯¯¯ is l, what is the length of J'K'¯¯¯¯¯¯¯? A) m × n × l B) (m + n) × l C) m × l D) n × l

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