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Q: IF The circumference is 20 what is the radius?

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The radius of a circle whose circumference is 40pi is 20 units.

Circumference = 2*pi*r = 125.66 metres

The radius is 1/2 of the circumference.

If the circumference is 34.54, the radius is 5.497211734394065.

If the circumference of a circle is 351.68 the radius is: 56

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Circumference is 2 x pi x radius so.....

The radius of a circle whose circumference is 40pi is 20 units.

The circumference is 20 times pi or appromixately 62.8.

The radius of this circle is 10 units.

20

r=3.18309

radius = 20/(2*pi) = 3.183098862 inches

Circumference of a circle equals Pi times the double the radius C = 2 x 3.14 x radius C= 2 x 3.14 x 20 C = 125.6 The circumference of a circle with a 20 foot radius is 125.6 feet.

Circumference = Pi * diameter. so Circumference = pi * 20 = 62.832

Multiply the radius by (2 x pi).

125.664 inches (rounded)

Circumference = 2*pi*r = 125.66 metres

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