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  1. JoannaBlackwelder
    • one year ago
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    The general equation of a circle is|dw:1439406361283:dw|

  2. JoannaBlackwelder
    • one year ago
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    Where (h,k) is the center of the circle and r is the radius.

  3. JoannaBlackwelder
    • one year ago
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    Can you identify r?

  4. anonymous
    • one year ago
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    r =64

  5. JoannaBlackwelder
    • one year ago
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    Close, r^2=64

  6. anonymous
    • one year ago
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    r=32

  7. JoannaBlackwelder
    • one year ago
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    No, 32^2 isn't 64

  8. JoannaBlackwelder
    • one year ago
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    You are thinking of 2r=64, I think

  9. anonymous
    • one year ago
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    i just need help finding the diameter

  10. JoannaBlackwelder
    • one year ago
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    We're almost there.|dw:1439406647777:dw|

  11. JoannaBlackwelder
    • one year ago
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    What number squared is 64?

  12. anonymous
    • one year ago
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    8

  13. JoannaBlackwelder
    • one year ago
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    Great! The radius is 8. So what is the diameter?

  14. anonymous
    • one year ago
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    16

  15. JoannaBlackwelder
    • one year ago
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    Right :-)

  16. anonymous
    • one year ago
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    thanks so much

  17. JoannaBlackwelder
    • one year ago
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    You're welcome

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spraguer (Moderator)
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