The radius of a circle that is 10 centimeter would be 3.18. This is taught in 3rd grade math.
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The diameter is always double the radius so in this case, it is 18cm
Its radius is 4.8 cm, rounded to the nearest tenth.
The circumference of a circle with a radius of 10 inches is about 62.83 inches.
The radius of this circle is 10 units.
Circumference of any circle = 2*pi*radius or diameter*pi