Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mingkkoo1 Group Title

Using only elementary geometry, determine angle x. Provide a step-by-step proof. You may use only elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use trigonomery, such as sines and cosines, the law of sines, the law of cosines, etc. There is a review of elementary geometry below. This is the hardest problem I have ever seen that is, in a sense, easy. It really can be done using only elementary geometry. This is not a trick question.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Koala Bird, MEet Pengu.

    • 2 years ago
  2. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    • 2 years ago
    1 Attachment
  3. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Koala Bird left.

    • 2 years ago
  4. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    WHat?

    • 2 years ago
  5. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    uh..... DONT LEAVE????

    • 2 years ago
  6. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Err. Start off nice an simple.

    • 2 years ago
  7. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Koala Bird!!

    • 2 years ago
  8. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    The bottom triangle, a to b; you can find out the last angle knowing that the total angle fo a triangle is 180.

    • 2 years ago
  9. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  10. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  11. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  12. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    You can use that new angle to find out the angle that is on the other side of it, knowing that the total angle is also 180.

    • 2 years ago
  13. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  14. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  15. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  16. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    With that, you can use the new angle you got to find the angle beside it, in triangle DE (the small triangle for which you are seeking)

    • 2 years ago
  17. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • 2 years ago
  18. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    KOALA BIRD IS BACK

    • 2 years ago
  19. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Er, whatever I'm thinking of, may be overcomplicating the question...

    • 2 years ago
  20. moneybird Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    @Not Tim You got the answer?

    • 2 years ago
  21. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Noo....

    • 2 years ago
  22. mingkkoo1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    nooooo

    • 2 years ago
  23. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    I was thinking: USe all major angles to find the last major angle, and then use the angle collected previously in Triangle DA for the angle. And then Find the angle for Triangle EB. -In summary, find all angles.

    • 2 years ago
  24. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    But done I would only get 1 angle for Triangle CDE

    • 2 years ago
  25. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Unless.

    • 2 years ago
  26. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Pengu, did yo uget all the angles within the triangle that reaches---WAIT. NO

    • 2 years ago
  27. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    That wouldn't work, as I would need the angles with CDE...

    • 2 years ago
  28. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Sorry. I reached the end of my useful line.

    • 2 years ago
  29. moneybird Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I find that triangle CDB is an isosceles triangle

    • 2 years ago
  30. JamesJ Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Call the point where the lines AE and DB intersect F. Then the angle AFB = 180 - (70 + 60) = 50 => the angle DFA = 130 => ADF = 40 The angle DCE = 180 - (80 + 80) = 20 => CEA = 150 That should get you started.

    • 2 years ago
  31. NotTim Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Imma leave. Sniff.

    • 2 years ago
  32. babystar16 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    hey mingkkool1.

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.