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10 July, 11:44

Henry knows that the circumference of a circle is 18Pi inches. What is the area of the circle?

36 pi inches squared

81 pi inches squared

162 pi inches squared

324 pi inches squared

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Answers (2)
  1. 10 July, 11:48
    0
    81 pi inches squared (Option B)

    Step-by-step explanation:

    C = 2 pi r

    18 = two pi r

    r = 9

    Then use the radius to find the area of the circle which is 81 pi.
  2. 10 July, 12:02
    0
    81π

    Step-by-step explanation:

    Because the circumference is 18 pi the diameter is also 18 which means the radius is 9. This means that its area is 81 pi.
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