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mrs.perkins

  • 2 years ago

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

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

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

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

  4. Monkeyball
    • 2 years ago
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    \[8*\pi\]

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

  6. mrs.perkins
    • 2 years ago
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    so whats the answer

  7. Monkeyball
    • 2 years ago
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    Look at my last post

  8. mrs.perkins
    • 2 years ago
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    so what do i do next

  9. mrs.perkins
    • 2 years ago
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    so is 32

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

  11. mrs.perkins
    • 2 years ago
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    i really dont know

  12. Champs
    • 2 years ago
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    Answer is 4

  13. mrs.perkins
    • 2 years ago
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    thanks

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