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The formula for size and circumference is pi x diameter. Let's work that backwards. If the circumference is 20, divide that by pi (3.14) that will give you the diameter. We know that the radius is half of the diameter, so take the answer you just got, divide by 2, and that will be the radius.
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What is the circumference of a circle with a radius of 20 feet?
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.
find the circumference of a circle 5ft radius?
20
What is the circumference of a circle with a radius of 10?
Circumference = Pi * diameter. so Circumference = pi * 20 = 62.832
If a circle circumference is 30 what is radius?
If a circle circumference is 30 the radius is: 4.77
What is the circumference of a circle with a 2pi radius?
The circumference of a circle with a 2pi radius is: 39.58
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