Circumference = pi x diameter
If we take pi to be 3.14 (2 decimal places) we get:
diameter = circumference / pi
= 3.14 / 3.14
= 1
Now the diameter is twice the radius so our radius is 0.5.
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divide the circumference by pie (3.14) and the answer would be the radius. for example circumference = 314 pie = 3.14 so 314 divide by 3.14 = 100 so the radius = 100
If a circle circumference is 30 the radius is: 4.77
The radius of a circle with a circumference of 59 is: 9.39
The circumference of a circle with a 2pi radius is: 39.58
The radius of a circle if its circumference is 42 is about 6.68