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You cannot really compare whether the area or perimeter is bigger, since they have different units. If you want to compare which one is numerically bigger, that depends primarily on what units you are using, as well as the magnitude of the lengths.
Nothing happens. A person sitting next to you won't know that you did anything to your circle. But you'll have a bigger circle. The radius will be double the originasl radius. The circumference will be double the original circumference. The area will be four times the original area.
28.26=area 18.84=circumference
circumference doesn't matter when solving for area..
The circumference of a circle is a line. Because it is a line it has no area, only length. So the area of the circumference cannot exist!