A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

What is the arc length of a circle that has a 7-centimeter radius and a central angle that is 40 degrees? Use 3.14 for π and round your answer to the nearest hundredth.

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @triciaal

  2. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    40 out of 360 is the ratio of the circumference you are looking for

  3. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Circumference = 2*pi*7 take 40/360 of that

  4. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438914335003:dw|

  5. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    to the nearest hundredth means to 2 decimal places. calculate to 3 . if the 3rd is 5 or more add 1 to the 2nd. if the 3rd is less than 5 just drop it.

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @DanJS Circumference=43.96 What do you mean by "take 40/360 of that"?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @triciaal I don't really understand what I'm supposed to do...

  8. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    40/360 is 1/9 of the total circle

  9. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so you want a ninth of the circumference for a 40 degree arc

  10. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    since you using decimals, 40/360 is about 0.11 so take 0.11 times circumference

  11. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the length of the arc varies with the angle complete circle = 360 degrees and the circumference is 2*pi* r set up ratio and solve for l

  12. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1438914919428:dw|

  13. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    are you ok now?

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @DanJS Thank you so much! @triciaal Yes, thanks a ton for your explanation!

  15. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    you are welcome

  16. DanJS
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    welcome

  17. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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.