anonymous
  • anonymous
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.)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
I'd say 55. Am I right? Or it's 125?
anonymous
  • anonymous
HINT: x and 125 are supplementary...

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AriPotta
  • AriPotta
1 Attachment
anonymous
  • anonymous
ur correct....
anonymous
  • anonymous
How do I know if they're supplementary?
AriPotta
  • AriPotta
because it's a straight line
AriPotta
  • AriPotta
they're a linear pair
Geometry_Hater
  • Geometry_Hater
It would add up to equal 180
anonymous
  • anonymous
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.
AriPotta
  • AriPotta
it's 55
AriPotta
  • AriPotta
i did the math on that pic i posted
anonymous
  • anonymous
Does it have to do with the lines? For example this question:
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Geometry_Hater
  • Geometry_Hater
Its the lower angle (It looks smaller so it has to be 55)
anonymous
  • anonymous
^ The answer for that one was 67.
AriPotta
  • AriPotta
right, because those angles were alternate exterior angles
anonymous
  • anonymous
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?
AriPotta
  • AriPotta
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AriPotta
  • AriPotta
that shows congruency
AriPotta
  • AriPotta
and any angles who are on a straight line add up to 180
AriPotta
  • AriPotta
because, it's a straight line and straight lines are 180 degrees
AriPotta
  • AriPotta
does that make sense?
anonymous
  • anonymous
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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AriPotta
  • AriPotta
those are corresponding angles
Geometry_Hater
  • Geometry_Hater
X is corresponding
AriPotta
  • AriPotta
they are congruent too though
anonymous
  • anonymous
See... That's what I don't understand. How do you guys know they are congruent. Sorry. i'm stupid. :/
AriPotta
  • AriPotta
look at the pic i posted
AriPotta
  • AriPotta
it shows all angles that are congruent
Geometry_Hater
  • Geometry_Hater
All lines are 180. So whenever we have an angles like that they will always equal 180 degrees together
anonymous
  • anonymous
Wait... I'm thinking haha.
anonymous
  • anonymous
Okay, so if they're congruent that means they have the same number right? 110 would be the answer for that one?
AriPotta
  • AriPotta
yea
Geometry_Hater
  • Geometry_Hater
Thats right
anonymous
  • anonymous
Okay so for this one it isn't congruent am i right? so the answer would be 75?
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AriPotta
  • AriPotta
those are congruent
AriPotta
  • AriPotta
they are also corresponding angles
Geometry_Hater
  • Geometry_Hater
They are corresponding because they are in similar places
anonymous
  • anonymous
AHHHHHHHHHHHHHHHHHHH. I DON'T GET THIS.
AriPotta
  • AriPotta
:/ i'm not sure how to explain it
Geometry_Hater
  • Geometry_Hater
Hmm hold on
Geometry_Hater
  • Geometry_Hater
|dw:1349397323829:dw| 1 and 5 would be corresponding angles because they are in the same places
AriPotta
  • AriPotta
1 Attachment
AriPotta
  • AriPotta
if you can read what i wrote lol.
anonymous
  • anonymous
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..
Geometry_Hater
  • Geometry_Hater
Every line isnt corresponding......... For instance in my drawing 1 and 5 are corresponding but not 1 & 6
AriPotta
  • AriPotta
no, no. i mean those ANGLES are corresponding
AriPotta
  • AriPotta
the lines are parallel and cut by a tranversal which makes the angles i listed corresponding and congruent
anonymous
  • anonymous
Thank you so much guys!
AriPotta
  • AriPotta
no problem :) do you understand it better?
anonymous
  • anonymous
yep! I hope so!
AriPotta
  • AriPotta
good luck with your other questions!
anonymous
  • anonymous
Thank you so much! Seriously!

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