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Best Answer

Circumference is 2 times pi (3.1415........) times the radius

Radius is circumference divided by (2 x 3.1415)

= 2.387

Another answer:

2*pi*radius = 15.7

radius = 15.7/2*pi

radius = 2.498732607 units

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Q: What is the radius of a circle if the circumference is 15.7?
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