The circumference is equal to the radius times 2 pi. Pi is approximately 3.14, so 2 pi is approximately 6.28; we then have this equation, 10 feet = 6.28r, so r = 10/6.28 feet which equals 1.59 feet.
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If the circumference of a circle is 10 feet the radius is: about 1.592 feet. For this type of calculation, divide the circumference by Pi (about 3.1416). This gives you the diameter. Next, divide the diameter by two to get the radius.
Circumference = 2*Ï€*radius = 20*Ï€ feet
Circumference = 2 x pie x radius Therefore, radius = 10/2/pie =1.6
The formula for circumference is 2 x pi x radius. For a circle of 10 feet, the cirumference would be 62.8 feet. The formula for area is pi x r2. For a circle of 10 feet, the radius would be 314.16 ft.
A circle with a radius of 10 m has a circumference of 62.83 m.