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mrs.perkins

If the radius of a circle is multiplied by 4, then how many times larger is the circumference of the new circle?

  • one year ago
  • one year ago

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  1. Monkeyball
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    The circumference of a circle is given by \[2*\pi*r\]

    • one year ago
  2. Monkeyball
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    and lets say we pick r=1 we get \[2*\pi\]

    • one year ago
  3. Monkeyball
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    now lets say that we multiply the radius by 4 so now r=4

    • one year ago
  4. Monkeyball
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    \[8*\pi\]

    • one year ago
  5. Monkeyball
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    8 pi is 4 times bigger than 2 pi

    • one year ago
  6. mrs.perkins
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    so whats the answer

    • one year ago
  7. Monkeyball
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    Look at my last post

    • one year ago
  8. mrs.perkins
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    so what do i do next

    • one year ago
  9. mrs.perkins
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    so is 32

    • one year ago
  10. Monkeyball
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    wait can you tell me what the original radius equals?

    • one year ago
  11. mrs.perkins
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    i really dont know

    • one year ago
  12. Champs
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    Answer is 4

    • one year ago
  13. mrs.perkins
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    thanks

    • one year ago
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