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

brookieismyname

The circle shown below has AB and BC as its tangents. If the measure of arc AC is 130°, what is the measure of angle ABC? 80° 65° 70° 75°

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    • 2 years ago
  2. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1335032976626:dw|

    • 2 years ago
  3. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1335033326418:dw|

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

    Arc AC is the part of the circle connecting A and C. It lies on the circumference of the circle.

    • 2 years ago
  5. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1335033299166:dw|

    • 2 years ago
  6. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    What does that say?

    • 2 years ago
  7. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    I need to know how to find the measure of abc

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

    The angle is actually equal to the (far arch-near arc)/2. The far arc is the one farther from the angle unknown. Since near arc = 130, far arc = 230. Therefore, the unknown angle is (230-130)(1/2) = (100/2) = 50 deg.

    • 2 years ago
  9. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    Thats not one of the options though

    • 2 years ago
  10. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    @eigenschmeigen take a look at this pls.

    • 2 years ago
  11. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    yeah i got 50 ill show:

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

    There is no right answer

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

    the answer is 50

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

    I aslo get 50 (draw line from centre to B, Pythagorus)

    • 2 years ago
  15. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1335033823663:dw|

    • 2 years ago
  16. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    @eigenschmeigen my man! love ur answers :D

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

    |dw:1335033908901:dw|

    • 2 years ago
  18. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1335033879923:dw| break it into two triangles, and we know triangles have interior angles that add up to 180 so that quadrilateral has 360 as the sum of its interior angles so \[130 + 90 + 90 +\alpha = 360 \] so\[\alpha = 360 - 90 -90 -130 = 50\]

    • 2 years ago
  19. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    The only problem is fifty's not an option

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

    aw thanks @integralsabiti :D means a lot to me

    • 2 years ago
  21. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    oh yeaaa :D that is the best part!

    • 2 years ago
  22. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    hmm 50 isnt an answer is it

    • 2 years ago
  23. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    No

    • 2 years ago
  24. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    if @eigenschmeigen says that the answer is 50 then u should make a new option :D option E.

    • 2 years ago
  25. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    haha

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

    :D

    • 2 years ago
  27. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    i'll check through the problem see if we missed something

    • 2 years ago
  28. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    i cant see any errors :/

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

    i checked it using some geometry software, its 50 for sure

    • 2 years ago
  30. integralsabiti
    Best Response
    You've already chosen the best response.
    Medals 2

    Abselutely agree.

    • 2 years ago
  31. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    The answer was 65 degrees, @eigenschmeigen @integralsabiti

    • 2 years ago
  32. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    im sorry, but either the answers are wrong or have written the question wrong i say this in the nicest possible way of course :) where was this question from?

    • 2 years ago
  33. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    • 2 years ago
    1 Attachment
  34. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    A test

    • 2 years ago
  35. eigenschmeigen
    Best Response
    You've already chosen the best response.
    Medals 1

    and you're sure its 130?

    • 2 years ago
  36. brookieismyname
    Best Response
    You've already chosen the best response.
    Medals 1

    I got it right, I guessed the right answer. It was 65

    • 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.