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Area = ~50.27 cm2
A circle with a radius of 4 cm has an area of 50.27 square cm.
It is: 16*pi square cm
Area = 1/4*Pi*d21/4*3.14*42 = about 12.56cm2
The formula for the circumference of a circle is C = πd, π = 3.142, d = 4cm C = 3.142 x 4cm C = 12.568cm