anonymous
  • anonymous
Need more help! will again fan and medal anyone who helps!! find the value of x. This diagram is not to scale
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
not a multiple choice can you just show me how to do it here is the diagram
1 Attachment
DanJS
  • DanJS
which is X, i dont see it on there
anonymous
  • anonymous
can either of you help @DanJS or @open_studier

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anonymous
  • anonymous
oops hold on there's an equation
anonymous
  • anonymous
Given:
DanJS
  • DanJS
ok, you need to know that the sum of the three angles in any triangle is 180 and the sum of the angles that make up a straight line is also 180
anonymous
  • anonymous
Yes, I get that but how do I put that into this problem?
DanJS
  • DanJS
|dw:1443217408787:dw|
DanJS
  • DanJS
They say SRT and STR are congruent, or the same angle, and they tell you one of the values
anonymous
  • anonymous
okay so would 4x=140
DanJS
  • DanJS
Angles that make up a straight line total 180, supplimentary angles STU + STR = 180
anonymous
  • anonymous
okay so instead of looking at this like a triangle I should look at this like its two angles that are supplementary?
DanJS
  • DanJS
you can look at it a few different ways, the short way i just did it was to realize STU + STR = 180 20 +4x = 180 4x = 160 x = 40
DanJS
  • DanJS
or if you want to use the fact that all 3 angles in a triangle add to 180 you can draw this ...
anonymous
  • anonymous
but wouldn't it be 40+4x=180?
anonymous
  • anonymous
oh wait I see because your only involving one of the angles, thanks!!!
DanJS
  • DanJS
|dw:1443217760568:dw|
anonymous
  • anonymous
yeah that looks confusing but thanks I got it now!!!
DanJS
  • DanJS
yeah, or you can draw that second line parallel to U, and use alternate interior angles are equal, the transversal is ST
anonymous
  • anonymous
yeah i see thanks
DanJS
  • DanJS
welcome

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