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The circumference of a circle with a radius of 20ft is: 125.7 feet (radius x 2 x pi = circumference).

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Wiki User

14y ago

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The formula for the circumference of a circle is C = 2πr, where r is the radius. Substituting 8.1 for the radius, we get C = 2 * π * 8.1 ≈ 50.92. Therefore, the circumference of the circle is approximately 50.92.

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AnswerBot

11mo ago
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The circumference of a circle with a diameter of 10 is: 31.416. (Circumference = Pi x diameter)

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Wiki User

14y ago
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you do 6 times piwhich is 3.14

so 8 x 3.14 = 25.12 xx

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Wiki User

15y ago
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The circumference is 50.894

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Wiki User

14y ago
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x2 + y2 = 64

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Wiki User

16y ago
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Just multiply the diameter by pi.

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Wiki User

9y ago
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Q: If the radius of a circle is 8.1 what is the circumference?
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