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marcoduuuh

  • 2 years ago

In the diagram below, BD is parallel to XY. What is the value of x? Note: BD and XY have the little line over them but I have no idea how to put it. (Picture below.)

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  1. marcoduuuh
    • 2 years ago
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  2. marcoduuuh
    • 2 years ago
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    I'd say 55. Am I right? Or it's 125?

  3. dpaInc
    • 2 years ago
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    HINT: x and 125 are supplementary...

  4. AriPotta
    • 2 years ago
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  5. dpaInc
    • 2 years ago
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    ur correct....

  6. marcoduuuh
    • 2 years ago
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    How do I know if they're supplementary?

  7. AriPotta
    • 2 years ago
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    because it's a straight line

  8. AriPotta
    • 2 years ago
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    they're a linear pair

  9. Geometry_Hater
    • 2 years ago
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    It would add up to equal 180

  10. marcoduuuh
    • 2 years ago
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    How do I know if I should put 55 or 125 because last time I did a problem like that and the answer was the same as 125.

  11. AriPotta
    • 2 years ago
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    it's 55

  12. AriPotta
    • 2 years ago
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    i did the math on that pic i posted

  13. marcoduuuh
    • 2 years ago
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    Does it have to do with the lines? For example this question:

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  14. Geometry_Hater
    • 2 years ago
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    Its the lower angle (It looks smaller so it has to be 55)

  15. marcoduuuh
    • 2 years ago
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    ^ The answer for that one was 67.

  16. AriPotta
    • 2 years ago
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    right, because those angles were alternate exterior angles

  17. marcoduuuh
    • 2 years ago
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    Supplementary lines: subtract from 180. Alternate exterior angles: the same as the other line. Am I right? If yes, how do I know the difference from both of the different lines?

  18. AriPotta
    • 2 years ago
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  19. AriPotta
    • 2 years ago
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    that shows congruency

  20. AriPotta
    • 2 years ago
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    and any angles who are on a straight line add up to 180

  21. AriPotta
    • 2 years ago
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    because, it's a straight line and straight lines are 180 degrees

  22. AriPotta
    • 2 years ago
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    does that make sense?

  23. marcoduuuh
    • 2 years ago
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    I think so... Okay, let me see if I've got it. Okay, so for that one... That's a Alternate exterior angle?

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  24. AriPotta
    • 2 years ago
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    those are corresponding angles

  25. Geometry_Hater
    • 2 years ago
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    X is corresponding

  26. AriPotta
    • 2 years ago
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    they are congruent too though

  27. marcoduuuh
    • 2 years ago
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    See... That's what I don't understand. How do you guys know they are congruent. Sorry. i'm stupid. :/

  28. AriPotta
    • 2 years ago
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    look at the pic i posted

  29. AriPotta
    • 2 years ago
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    it shows all angles that are congruent

  30. Geometry_Hater
    • 2 years ago
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    All lines are 180. So whenever we have an angles like that they will always equal 180 degrees together

  31. marcoduuuh
    • 2 years ago
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    Wait... I'm thinking haha.

  32. marcoduuuh
    • 2 years ago
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    Okay, so if they're congruent that means they have the same number right? 110 would be the answer for that one?

  33. AriPotta
    • 2 years ago
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    yea

  34. Geometry_Hater
    • 2 years ago
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    Thats right

  35. marcoduuuh
    • 2 years ago
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    Okay so for this one it isn't congruent am i right? so the answer would be 75?

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  36. AriPotta
    • 2 years ago
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    those are congruent

  37. AriPotta
    • 2 years ago
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    they are also corresponding angles

  38. Geometry_Hater
    • 2 years ago
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    They are corresponding because they are in similar places

  39. marcoduuuh
    • 2 years ago
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    AHHHHHHHHHHHHHHHHHHH. I DON'T GET THIS.

  40. AriPotta
    • 2 years ago
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    :/ i'm not sure how to explain it

  41. Geometry_Hater
    • 2 years ago
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    Hmm hold on

  42. Geometry_Hater
    • 2 years ago
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    |dw:1349397323829:dw| 1 and 5 would be corresponding angles because they are in the same places

  43. AriPotta
    • 2 years ago
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  44. AriPotta
    • 2 years ago
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    if you can read what i wrote lol.

  45. marcoduuuh
    • 2 years ago
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    I can! Wait... So that would mean every line is corresponding? Why do I sometimes have to put the same number that's on top and then other times i have to subtract from 180..

  46. Geometry_Hater
    • 2 years ago
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    Every line isnt corresponding......... For instance in my drawing 1 and 5 are corresponding but not 1 & 6

  47. AriPotta
    • 2 years ago
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    no, no. i mean those ANGLES are corresponding

  48. AriPotta
    • 2 years ago
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    the lines are parallel and cut by a tranversal which makes the angles i listed corresponding and congruent

  49. marcoduuuh
    • 2 years ago
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    Thank you so much guys!

  50. AriPotta
    • 2 years ago
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    no problem :) do you understand it better?

  51. marcoduuuh
    • 2 years ago
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    yep! I hope so!

  52. AriPotta
    • 2 years ago
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    good luck with your other questions!

  53. marcoduuuh
    • 2 years ago
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    Thank you so much! Seriously!

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