r= 9 so diameter is 2x the radius =18 cm
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A circle with a radius of 4.5Cm has an area of 63.62Cm2
The diameter of a circle is double the radius so it has to be 9cm
Diameter of circle = 2 * Radius of the circle.
Since diameter is twice its radius, the radius of this circle would be 60
The radius (radii) of a circle is 1/2 of the diameter. The radius of a circle with a 6.2 cm diameter is 3.1 cm.