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is3535

  • one year ago

What is the exact area of a circle whose diameter is 18 cm?

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  1. is3535
    • one year ago
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    @butterflydreamer

  2. Vocaloid
    • one year ago
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    radius = diameter/2 Area of circle = pi*(radius)^2

  3. is3535
    • one year ago
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    |dw:1433048366934:dw|

  4. is3535
    • one year ago
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    A≈254.47cm²

  5. Vocaloid
    • one year ago
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    yup! I'm not sure why it doesn't match with any of the 4 answer choices, though....

  6. is3535
    • one year ago
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    yea me to now what

  7. Vocaloid
    • one year ago
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    is 81pi one of the answer choices?

  8. is3535
    • one year ago
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    yes

  9. Vocaloid
    • one year ago
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    great, that should be the answer! remember, after you multiply 9*9*pi, you get 81pi. sometimes you can just leave it like that

  10. is3535
    • one year ago
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    ty

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