A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

how to find the radius and circumfernce in a circle

  • This Question is Open
  1. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    formula to find circumference \[\huge\rm C= 2 \pi r\] r =radius if the given is diameter then you use \[C= \pi d \] remember radius is half of diameter \[\large\rm r=\frac{ d }{ 2 }\]

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

    ive seen a problem where it just gives a circle and says find the radius.. how is that possible if it doesn't give anymore info on it?

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

    do you have example like what ?

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

    post the original question :=)

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

    |dw:1443384439854:dw| find the radius...

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

    bad circle sry lol

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

    hahha thats fine you can use the tool in draw

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

    |dw:1443384527525:dw|

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

    how did you find the radius if it doesn't give any info on the circle

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

    ok actually here is another problem i have str8 from the review

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

    radius is half of diameter and diameter is straight line passing through the center of the circle

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

    |dw:1443384671583:dw| find the circ and area of each circle. round to nearest 10th

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

    yes that's the diameter a line passing through the center now use the formula to find radius i repeat radius is `Half` of diameter \[\huge\rm r=\frac{ d }{ 2}\]

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

    r=radius d=diameter so you can replace d with 8

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

    its not asking for the radius its asking for the circumference and area though

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

    its 18 sry sloppy

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

    oh okay so use the formula i posted above read my first comment

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

    \[9\times \pi \times 9?\]

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

    sry 2 instead of 9 at the front

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

    yes right ! \[\large\rm 2 \pi 9\]

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

    mind if i give 1 more example?

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

    sure!

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

    go for it

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

    oh and how do i find the area? thats also what it asks

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

    oh to find area \[\huge\rm A= \pi r^2\]

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

    \[81\times \pi?\]

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

    yes right you can use pi but if it says write answer in terms of pi then 81pi is the answer

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

    ok then 1 more question if you don't mind =D

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

    alright

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

    |dw:1443385350101:dw| find circumference and area

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

    so circumference is 26

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

    try it

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

    not just 26

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

    sry i mean diameter

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

    remember it's \[\huge\rm C=2 \color{reD}{\pi} r \]

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

    meant diameter is 26

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

    yes right diameter is 26 :=)

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

    \[2 \times \pi \times 13?\]

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

    looks good

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

    i think i just learned how to get the diameter, circ, and area of a circle =O

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

    good ! :=)

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

    thanks for the help =D

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

    np it was my pleasure :=) welcome to openstudy btw

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

    thanks =D

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

    o^_^o

  46. 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.