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jessiesec

  • 3 years ago

Find the circumference and the area of a circle with a radius of 11.2 cm. Round to the nearest tenth.

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  1. Mimi_x3
    • 3 years ago
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    well do you know the formula for the circumference of a circle

  2. jessiesec
    • 3 years ago
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    not really. I've never really been good at this.

  3. Mimi_x3
    • 3 years ago
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    okay so a circum of a circle is \(C = 2\pi r\)

  4. jessiesec
    • 3 years ago
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    ok

  5. Mimi_x3
    • 3 years ago
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    \(r\) is given so you sub it into the formula; and calculate

  6. jessiesec
    • 3 years ago
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    OK.

  7. Mimi_x3
    • 3 years ago
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    nb: area of a cirlce is \(A = \pi r^2\)

  8. jessiesec
    • 3 years ago
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    Ok. I think I got it now. Thank you!

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