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gabbyalicorn

  • one year ago

Which circles have a circumference of units? Choose all answers that are correct. A. a circle with a diameter of 40 units B. a circle with a radius of 10 units C. a circle with a diameter of 20 units D. a circle with a radius of 20 units Im think A C and D but i really don't know this one

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  1. gabbyalicorn
    • one year ago
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    @geerky42

  2. gabbyalicorn
    • one year ago
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    @zepdrix

  3. gabbyalicorn
    • one year ago
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    im looking at pics of a circumference and now i think its B

  4. geerky42
    • one year ago
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    "Which circles have a circumference of units" how much units?

  5. geerky42
    • one year ago
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    well idk because there is no picture for me to see

  6. gabbyalicorn
    • one year ago
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    there is no picture...

  7. gabbyalicorn
    • one year ago
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    @UsukiDoll

  8. geerky42
    • one year ago
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    Your question is missing something.

  9. unknownunknown
    • one year ago
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    Gabby you'll need to be more specifi with the question. @geerky42 could you help me please?

  10. geerky42
    • one year ago
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    Which circles have a circumference of __?__ units

  11. gabbyalicorn
    • one year ago
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    well thats all it says ill take a screenshot

  12. gabbyalicorn
    • one year ago
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    @geerky42

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  13. unknownunknown
    • one year ago
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    Gabby you missed the Pi there, that's very important =)

  14. gabbyalicorn
    • one year ago
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    oh

  15. gabbyalicorn
    • one year ago
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    ooooooooh

  16. unknownunknown
    • one year ago
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    So circumference = 2*radius * pi. And diameter = 2 * radius. So circumference also = diameter * pi Can you solve it now?

  17. gabbyalicorn
    • one year ago
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    so 4pi

  18. gabbyalicorn
    • one year ago
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    ?

  19. unknownunknown
    • one year ago
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    So let's look at (a). If d = 40. What is d * pi? Does that equal 20 * pi?

  20. gabbyalicorn
    • one year ago
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    no

  21. unknownunknown
    • one year ago
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    Very good. Can you do the same for (b) now?

  22. gabbyalicorn
    • one year ago
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    b is not correct either so now its just C and D

  23. gabbyalicorn
    • one year ago
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    I think D

  24. gabbyalicorn
    • one year ago
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    because it needs a radius

  25. unknownunknown
    • one year ago
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    b is correct. let's go through it carefully. Remember, diameter is radius * 2. So you must multiply that 10 by 2.

  26. gabbyalicorn
    • one year ago
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    oooooh i see what you're going at

  27. unknownunknown
    • one year ago
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    diameter can be converted to radius (d = 2*r). Also, radius can be converted to diameter (r = d/2)

  28. gabbyalicorn
    • one year ago
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    Okay, I get it now. Thank you! √

  29. unknownunknown
    • one year ago
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    No problem! Good luck =)

  30. gabbyalicorn
    • one year ago
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    It was B and C. Thanks for your help though. :)

  31. unknownunknown
    • one year ago
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    yep, that's right.

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