since C=2Pixr, if we double r, we need to double C also. 2C=2Pix 2r
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It quadruples.
the area of the circle is increased by 400%
If a circle has a circumference of 43.98 the radius is: 7 (6.999).
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
The radius of a circle with a circumference of 30 inches is: 4.77 inches.