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Q: How do you find the circumference of a circle when the raduis is a fraction?

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the fraction of the circle covered by the arc

To find the circumference of a circle in rhombus you eat SH*t .

Divide the known circumference by pi to find the diameter of the circle.

The circumference is: 32.1

The circumference of a circle with an 81.6 cm diameter is: 256.4 cm

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Radius = circumference/pi

Circumference of a circle: 2 x pi x radius.

Radius (not raduis) =circumference/(2*pi)

Circumference = 2*pi*r where pi = 3.14159 (approx) and r is the radius.

to find the raduis of any circle, divde the diameter by 2. in this case, the answer would be 3.50

The perimeter of a circle is called the circumferenceTo find the circumference of a circle you do 2 times pi times radiusC = 2 * 3.14159 * 7 = 43.98inchesSince this is a half circle you have to take half of the circumference...you answer is 21.99inches

the fraction of the circle covered by the arc

You cannot.A circle has no mass nor volume and so the concept of density is not appropriate.Also, the word is radius, not raduis!

The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.

find the radius of a circle with circumference of 42.1

The circumference of a circle is the length of the circle's perimeter.

Diameter of a circle = circumference/pi

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