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anonymous

  • one year ago

Need more help! will again fan and medal anyone who helps!! find the value of x. This diagram is not to scale

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  1. anonymous
    • one year ago
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    not a multiple choice can you just show me how to do it here is the diagram

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  2. DanJS
    • one year ago
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    which is X, i dont see it on there

  3. anonymous
    • one year ago
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    can either of you help @DanJS or @open_studier

  4. anonymous
    • one year ago
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    oops hold on there's an equation

  5. anonymous
    • one year ago
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    Given:<SRT is congruent to <STR, m<SRT=20, m<STU=4x

  6. DanJS
    • one year ago
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    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

  7. anonymous
    • one year ago
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    Yes, I get that but how do I put that into this problem?

  8. DanJS
    • one year ago
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    |dw:1443217408787:dw|

  9. DanJS
    • one year ago
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    They say SRT and STR are congruent, or the same angle, and they tell you one of the values

  10. anonymous
    • one year ago
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    okay so would 4x=140

  11. DanJS
    • one year ago
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    Angles that make up a straight line total 180, supplimentary angles STU + STR = 180

  12. anonymous
    • one year ago
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    okay so instead of looking at this like a triangle I should look at this like its two angles that are supplementary?

  13. DanJS
    • one year ago
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    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

  14. DanJS
    • one year ago
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    or if you want to use the fact that all 3 angles in a triangle add to 180 you can draw this ...

  15. anonymous
    • one year ago
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    but wouldn't it be 40+4x=180?

  16. anonymous
    • one year ago
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    oh wait I see because your only involving one of the angles, thanks!!!

  17. DanJS
    • one year ago
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    |dw:1443217760568:dw|

  18. anonymous
    • one year ago
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    yeah that looks confusing but thanks I got it now!!!

  19. DanJS
    • one year ago
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    yeah, or you can draw that second line parallel to U, and use alternate interior angles are equal, the transversal is ST

  20. anonymous
    • one year ago
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    yeah i see thanks

  21. DanJS
    • one year ago
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    welcome

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spraguer (Moderator)
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is replying to Can someone tell me what button the professor is hitting...

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